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Miniature invisible earpiece worn inside the ear

Invisible Earpieces & Wireless Spy Earpiece Kits

Stay in the conversation without a visible headset. Endoacustica spy earpiece kits deliver a caller's voice to a miniature receiver inside your ear. Choose a Bluetooth kit for your cell phone, a standalone cellular system or a covert earpiece for your two-way radio.

Each kit combines a discreet in-ear receiver with an induction accessory that carries the audio to it. Phone-based setups let you talk with someone across town or across the country wherever suitable service is available. Browse the kits below, then request pricing and help checking your phone, radio or carrier compatibility.

Choose Your Spy Earpiece Kit

Invisible Earpiece
Bluetooth Neckloop

Inductive earpiece with a Bluetooth neckloop. Phone-to-neckloop range up to 33 ft (10 m). Uses your phone for calls. Optional Knowles microphone.

Standalone GSM
Earpiece Kit

SIM-based neckloop with auto-answer and a built-in microphone. No separate phone needed. For compatible GSM networks; check availability for U.S. use.

4G Camera
& Earpiece Kit

5 MP autofocus camera and inductive earpieces. Send photos and short videos over 4G LTE. Supports VoLTE calls and MP3 playback. Carrier compatibility required.

Bluetooth Watch
Earpiece Kit

Watch with a built-in microphone and Bluetooth range up to 33 ft (10 m) from your phone. An inductive earpiece delivers incoming call audio.

Bluetooth Glasses
Earpiece Kit

Bluetooth glasses with a microphone send phone audio to an inductive earpiece. Frames accept prescription or sunglass lenses fitted by an optician.

Bluetooth Pen
Earpiece Kit

Pen with a built-in microphone and Bluetooth range up to 33 ft (10 m) from your phone. Listen through an inductive earpiece and speak into the pen.

Covert Earpiece
for Two-Way Radios

Inductive receiver with a wired radio adapter. Hear radio traffic without cell service. Radio model compatibility required; range depends on radio and terrain.

Find the Right Invisible Earpiece Kit

Start with the device you want to use for communication. A Bluetooth kit works with your phone, a standalone cellular kit has its own SIM, and a radio kit connects to a compatible two-way radio. Then choose the accessory you want to wear and the microphone setup that fits your work.

Bluetooth Earpiece Kits for Your Cell Phone

Want to take calls through a hidden earpiece while keeping your phone in a pocket or bag? The EAR-GSM Bluetooth neckloop kit pairs with a compatible phone and sends call audio to the miniature receiver through induction. Despite its model name, EAR-GSM uses your phone for the cellular connection.

You can also choose a Bluetooth watch, glasses or pen. Each configuration changes where you wear the accessory and how you position the microphone. Send us your iPhone or Android model so we can check compatibility before you order.

Bluetooth connects your phone to the accessory. Induction connects the accessory to your earpiece. These kits do not require a Bluetooth receiver inside the tiny in-ear unit.

A Standalone Earpiece Without a Separate Phone

The SilentWave GSM neckloop kit combines a cellular module and an induction unit in one wearable accessory. On a supported network, its SIM handles incoming calls, while the neckloop delivers audio to the earpiece. Automatic answering and a built-in microphone support conversations without a separate phone.

For U.S. use, have us verify the exact cellular configuration before ordering. A legacy dual-band GSM module is not equivalent to a 4G LTE device, and a SIM alone does not establish compatibility. Network generation, frequency bands and carrier support all matter. If you already use a supported smartphone, a Bluetooth kit lets that phone handle the network connection.

Covert Earpieces for Two-Way Radios

For teams that already use radios, VX-RADIO routes received radio audio through a wired induction adapter to the wireless receiver in your ear. It is an option for locations without cell service, provided your radio system has coverage.

Operating range depends on the radio, terrain and surrounding structures. The kit does not add range to the radio itself. A radio network that supports mesh relaying may extend coverage through additional, properly positioned nodes; this capability belongs to the radio system, not the earpiece.

Include your radio make, model and connector requirements when requesting a quote. We can check the adapter and any microphone or push-to-talk accessories your setup needs.

A Hidden Camera and Earpiece in One Kit

When the person assisting you also needs images, EARCAM-5MP adds a 5 MP autofocus camera to an inductive earpiece system. It supports sending photos and short videos over 4G LTE, VoLTE calls and MP3 playback without a separate cell phone.

Request confirmation of the supplied version, LTE bands and carrier support for the country where you will use it. A 4G label alone does not guarantee U.S. carrier compatibility.

How a Wireless Spy Earpiece Works

The in-ear receiver reproduces audio sent by a nearby induction unit. That unit may be built into a neckloop or another wearable accessory. For phone-based kits, your phone receives the call and passes the audio to the accessory. A microphone picks up your voice and sends it back through the phone.

This separates the two jobs: the phone or radio handles communication with the other person, while the induction unit handles the short connection to your ear. Follow the positioning instructions for the specific kit.

Long-Distance Calls, Short-Range Wireless Connections

Your contact can be across the room or across the country. When you use a cellular call, communication has no fixed distance limit between callers, as long as suitable service is available at both ends. The earpiece does not transmit directly over that distance.

The local links still have limits. EAR-GSM, BT-WATCH and BT-PEN specify a Bluetooth range of up to 33 ft (10 m) between phone and accessory; actual range depends on conditions. The induction unit must remain close to the earpiece. Radio-based communication follows the range of the radio system.

What Makes an Earpiece Invisible?

A small receiver, a discreet finish and no external wire running to the ear help an invisible earpiece blend in. The fit depends on both the model and your ear. Consider the whole setup, including the accessory and microphone, when deciding how you want to wear it.

Invisible does not mean impossible to detect. Use the receiver as instructed and follow the supplied fitting and removal guidance.

Battery Life and What Comes in the Kit

Plan around the runtime of every component: the earpiece, the wearable accessory and your phone or radio. A rechargeable neckloop may use a different battery system from the receiver. Talk time and standby time are different specifications.

Before ordering, confirm the included receiver, microphone, charger, batteries and cables. Tell us how long a session needs to last so we can help you check the quoted configuration.

Discreet Communication for Presenters and Professional Teams

An in-ear prompter can help a presenter or performer receive cues from a colleague. A covert radio earpiece can help staff hear team communications without an exposed headset. Choose the connection around your existing workflow, whether that is a phone call or a radio channel.

For live production, check the audio source, timing requirements and connection method with your technical team. A phone-based kit should not be assumed to connect directly to an existing broadcast IFB system.

Two Technologies, One Practical Idea

About twenty years ago, Endoacustica's technical team brought together two technologies it already knew: inductive earpieces used with radios and cellular calling. The resulting kit delivered a caller's voice directly to a miniature receiver in the ear, extending communication beyond the range of a direct radio link wherever mobile service was available.

That approach still guides the choice today: select the connection that reaches your contact, then the wearable setup that works for you.

Get Pricing and Help Choosing Your Kit

Open a product page for details, or request a quote and compatibility advice. Endoacustica offers help before purchase and technical support after the sale.

  • Tell us your device: phone model or radio make and model.
  • Tell us where it will be used: country and carrier for cellular kits.
  • Describe the setup: preferred accessory, microphone placement and required runtime.

Choose your earpiece kit or ask us to help you select one.

Use communication equipment only where permitted by applicable rules. Product features do not authorize outside assistance during an exam or other restricted activity.

Spy Earpiece Questions, Answered

A wearable induction unit sends audio to the miniature receiver in your ear. Depending on the kit, that unit gets its audio from your phone over Bluetooth, from a built-in cellular module, or from a connected two-way radio. A microphone provides the return voice path on kits equipped for two-way communication.

Not in the inductive kits shown here. Your phone pairs with the neckloop, watch, glasses or pen. That accessory then sends audio to the earpiece through induction. Keep both the phone-to-accessory connection and the accessory-to-earpiece connection within the limits specified for the kit.

Compatibility depends on the phone and the Bluetooth calling features supported by the kit. Send us your exact phone model before ordering. We can help check the pairing requirements and the setup you need for calls.

Yes, with a suitable standalone cellular kit or a radio-based setup. A GSM neckloop handles calls through its own SIM on a compatible network. VX-RADIO receives audio from a compatible two-way radio. The radio option does not require cellular coverage.

Do not assume a legacy dual-band GSM kit will work with a U.S. SIM. Network technology, frequency bands and carrier support must match the exact device. For U.S. use, ask us to check the current configuration. A Bluetooth kit uses your compatible phone for the cellular connection; a 4G kit also requires band and carrier verification.

When the kit uses a phone call, the other person can be across town or in another country, provided both ends have suitable service. The call is not limited by the Bluetooth link. Your phone must stay near the Bluetooth accessory, and the induction unit must stay near the earpiece. Radio setups are limited by the radio system and local conditions.

Invisible describes the small receiver and discreet fit inside the ear. Visibility varies with the model, ear shape and placement. It does not mean the device is impossible to spot or detect. Follow the fitting and removal instructions supplied with your kit.

Battery life varies by kit and component. Check the earpiece battery separately from the neckloop or other accessory, and include your phone or radio in your runtime planning. Ask for the talk time, battery type and charging requirements of the configuration being quoted.

EARCAM-5MP combines inductive earpieces with a 5 MP autofocus camera. It sends photos and short videos over 4G LTE and supports VoLTE calling and MP3 playback. Ask us to verify the supplied version, network bands and carrier support for your location.

Request a quote for the model you want. Pricing depends on the kit and selected accessories. Include your phone or radio model, country of use and required operating time so we can confirm compatibility, the included components and current availability.