Item Type: Bluetooth Adapter Material: ABS Bluetooth Version: 5.0 Charging: DC 5V Built in Lithium Battery: 300mAh Working Time: 6 hours Charging Time: 2 hours Output: 3.5mm Audio Output Package List 1 x Bluetooth Adapter 1 x Audio Cable 1 x Charging Cable 1 x Manual 1WIRELESS AUDIO TRANSMISSION: This 2 in 1 wireless adapter supports automatic search and connection of Bluetooth devices to achieve wireless audio transmission. Support audio equipment with audio input interface to realize wireless audio reception and transmission. 2PURE SOUND QUALITY: This Bluetooth 5.0 transmitter receiver has built in AEC noise cancellation and ANC noise cancellation circuits, gorgeous stereo sound, and purer sound quality. Built in enhanced signal transmission circuit, fast and stable connection. 3SMART COMPATIBILITY: This 3.5mm wireless transmitter is compatible with dual lossless audio formats. Smart compatible, for Android, for IOS system mobile phones and for PAD, as well as all Bluetooth audio devices. Support auxiliary input output. 4SIMPLE AND CONVENIENT OPERATION: This 2 in 1 Bluetooth adapter is easy to connect, without any cumbersome drivers and downloading applications. Automatic memory connection function, simpler operation and more convenient connection. 52 IN 1 WIRELESS ADAPTER: This 3.5mm 2 in 1 wireless adapter supports the one to two function in the activated state and supports stereo in the transmission mode. Built in battery, battery life is long.