1、Support for audio devices with audio input, used for wireless audio reception and transmission. 2、Supports automatic search to connect bluetooth devices, to achieve wireless audio transmission. Built‑in AEC aftersound elimination and ANC noise elimination circuit, gorgeous stereo, sound quality more pure beautiful. 3、Built‑in enhanced signal transmission circuit, fast and more stable connection, constant sound. 4、Compatible with dual lossless audio formats for hands‑free call. Built‑in battery, super long endurance life. 5、Function, more simple operation, more convenient connection. Bluetooth 0, low power consumption. 6、Smart compatibility for Android/IOS system mobile phone/IOS laptop and all Bluetooth audio devices. Condition: 100% Brand NewItem Type: Receiver TransmitterModel: BT-11Material: ABSColor: As Pictures ShownBluetooth Program： 5.0 EDR, A2DP, HSP, AVRCPFrequency： 2.4GHz- 2.48GHzBluetooth Transmitting Distance: ≤10MBluetooth Receiving Distance: ≤10MCharging Voltage：DC 5VBattery: 300mAhWorking Time: Around 6 HoursWeight: Approx. 90g