Usage Tips:Adopt Qualcomm Bluetooth 5.2 chip, Support aptX-HD/aptX-LL/SBC/AAC,No delay and lossless decoding technology, ensure perfect sound quality, high-quality audio, let you feel the Hifi music of CD fever level. 2-in-1 function, support receiving and mitter functions. Support Dual Stream,Multipoint Connect. Bluetooth mitter function(TX),can connect 2 Bluetooth headsets/speakers at the same time.(Use the same bluetooth headset/speaker or the same Audio format encoding, The effect will be the best.); Bluetooth Receiver function(RX),can connect 2 smartphones. RX Receiver Mode For: Car Kit/Wired Speaker/Home Speaker/Power amplifier/Headphone ect...; TX mitter Mode For: TV/PC/Laptop/Projector/Power amplifier/TV Box/Bluetooth Headphone/Earphone/Bluetooth Speaker ect... It is just a 2-in-1 bluetooth audio mitter receiver. Can only be used for audio mission, so you can't use it for your keyboard, mouse, file fer. The function of the bluetooth mitter is to add a bluetooth function to devices without bluetooth function such as TV/computer, so that they can connect to bluetooth speakers/headphones. This is a Bluetooth mitter buit with the est technology , it wouldn't show in the Bluetooth devices in your phone, computer or TV and you only need to make the Bluetooth devices close to this Bluetooth mitter then they will connect with each other automatically. The function of the Bluetooth receiver is to add Bluetooth wireless function to the wired speaker/headphone, so that the Bluetooth-enabled device such as the mobile phone can be wirelessly connected to the wired speaker/headphone through the adapter. With Independent LED indicator light, the status is clearer and more intuitive; Type-C Fast charging port, more convenient to use;( mitter mode supports TypeC interface audio input) 3.5MMaudio input/output interface, strong versatility; Built-in 500mAh rechargeable battery, long ba