SuperTooth Relay BTTC-218 Bluetooth Transmitter 25Hrs 3.5mm
Connects wireless headphones to 3.5mm audio sources such as airplane seat screens with Qualcomm aptX Adaptive and up to 25 hours battery life
- ColorBlack
- Talk TimeUp to 15 hour(s)
- Music TimeUp to 15 hour(s)
- Standby TimeLithium-Polymer
- Charge Time2 Hours
- Bluetooth ProfileAVRCP
- Connects to airplane seat screens via 3.5mm jack
- Qualcomm chip with aptX Adaptive and HD audio
- Pairs two Bluetooth headphones for shared listening
- Firmware-upgradeable for ongoing compatibility improvements
- Up to 25 hours battery with built-in volume controls
Airplane Seat Audio Adapter
The SuperTooth Relay BTTC-218 connects to aircraft seatback screens through a standard 3.5mm AUX jack. It streams in-flight entertainment wirelessly to your own Bluetooth headphones such as AirPods or Bose models. The device is built specifically for travel scenarios and is not compatible with TVs, phones, tablets, hearing aids or musical instruments. It functions as a transmitter only and cannot receive audio from other sources.
Dual Link And Firmware Updates
The adapter supports simultaneous pairing of two Bluetooth headphones so two listeners can share the same audio source. A supplied dual 3.5mm plug adapter ensures compatibility with both single and twin-jack airline sockets. Firmware can be upgraded to improve AirPods compatibility, dual-device stability and overall performance over time. The Qualcomm chip enables aptX Adaptive and aptX HD audio codecs for clearer wireless sound.
Simple Setup With Long Battery
Pairing is handled through intuitive LED indicators that guide you through single or dual device connections. Built-in volume controls and a clear battery indicator let you adjust levels without touching the seat screen. The lithium-polymer battery delivers up to 25 hours of playtime and recharges fully in 2 hours. The transmitter-only design means it will not pair with phones or tablets, avoiding accidental connections.
Highlights
- Connects to airplane seat screens via 3.5mm jack
- Qualcomm chip with aptX Adaptive and HD audio
- Pairs two Bluetooth headphones for shared listening
- Firmware-upgradeable for ongoing compatibility improvements
- Up to 25 hours battery with built-in volume controls
Specifications
| Brand | SuperTooth |
|---|---|
| Series | Relay |
| Model | BTTC-218 |
| Part Number | BTTC-218 |
| Color | Black |
| Talk Time | Up to 15 hour(s) |
| Music Time | Up to 15 hour(s) |
| Standby Time | Lithium-Polymer |
| Charge Time | 2 Hours |
| Bluetooth Profile | AVRCP |
| Battery | Lithium-Polymer |
| Specifications | Bluetooth, aptX, aptX-Adaptive, aptX-Low Latency, Lithium-Polymer, 1. aptX-Adaptive Support; 2. Dual Link; 3. 20hr Playtime, Bluetooth, Auxiliary, 3.5mm Audio Jack, Bluetooth headphones or earbuds, Warranty - 12 months (extend to 24 months with product registration) / Extensive Support: Chat, Email, Phone, Online Clinic, Video Tutorials, FAQ and Registration - avantree.com/support |
Questions about this item
How long before the built-in battery needs recharging on a long flight?
The internal lithium-polymer cell delivers up to 25 hours of playtime and recharges in two hours via USB-C.
What connection limit appears first when streaming to two headsets continuously?
Dual Link supports two Bluetooth headphones simultaneously; a third device cannot be added.
Does the adapter get warm or noisy during a full-day journey?
Solid-state design means no fan noise and negligible heat during extended use.
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