1,Low latency technology eliminates bluetooth audio delay, allowing you to watch TV/movie videos and listen to high definition sound in perfect synchronization. 2,The built in battery provides a bluetooth adapter, which can be used for more than 12 hours after charging for 2 hours. It also supports simultaneous charging and streaming. 3,Support optical (for TOSLINK) digital and 3.5mm (AUX and RCA), you get maximum flexibility, support input and output. Easy setting allows you to easily enjoy wireless audio at home or on the go. 4,Keep your old stereo or wired headphones alive through the new bluetooth wireless connection, pair with a smartphone or tablet up to 10 meters away, and enjoy cable free music. 5,Dual mode transmitter and receiver, 2‑in‑1 bluetooth V5.0 transmitter and receiver, lightweight and upgraded, able to use as a transmitter or receiver, both input and output are supported. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.