Feature Embedded ARM926EJ-S core, 4KB lcache and 4kB Dcache Support stereo codec Support HFP, HSP, A2DP, AVRCP, and SPP configuration files Noise reduction and echo cancellation Multi-band equalizer configuration Support for packet loss concealment Multipoint HFP and A2DP Support voice prompt Integrated lithium-mode battery charger supports 300 mA fast charging and over-discharge protection Bluetooth version 4.2 3.5mm stereo plug. Support Bluetooth protocol A2DP and AVRCP Distance: within 10 meters When used in the Bluetooth mitter mode, it can wirelessly mit the music on your mobile phone, walkman, TV, computer device to your Bluetooth receiver, stereo Bluetooth headset or Bluetooth speaker and other devices. 5. When used in Bluetooth receiver mode, it can be used as a stereo Bluetooth headset (only the headset cable needs to be inserted into the 3.5MM interface) or connected to speakers and other devices to complete the wireless mission of audio signals. Colour: Black Material: ABS Package Contents: 1 * mitter receiver 1 * 3.5 audio cable 1 * data cable 1 * TV AV cable 1 * manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.