1. Bluetooth version: 4.12. No need to install any software, plug and play3. Transmit the TV sound to the home combo speaker via Bluetooth, no need to worry about wiring troubles4. Transmit the TV sound to the Bluetooth headset via Bluetooth, you can enjoy it alone in the dead of night 5. Shocking sound effects, no need to worry about disturbing others6. This Bluetooth transmitter is not only suitable for families, but also suitable for classroom lectures and conference lecture occasions7. Speak directly to the mark of the product, you can emit the speech sound to the Bluetooth speaker, no 8. You need to worry that the sound is too small, others will not hear it, and your voice will no longer be smoky.9. Weight: 9 grams10. Bare metal size: 4x4x8 cmIntroduction:1. Support paired Bluetooth stereo headset/headphone to control play/pause, forward/backward2. Support automatic pairing (no buttons)3. Support pairing pin code: 1234000088884. Frequency range: 2.42 to 2.480 MHz (analog) spectrum5. Frequency range: 2.42 to 2.480 MHz (analog) spectrum6. Working current: 40mA max7. Compatible with 30PIN8. Operating range: 10 meters

http://olla.gr/ipf01-30-pin-bluetooth4.1-audio-transmitter-for-ipod-random-colour-delivery/