Bluetooth Transmitter & Receiver. Transmitter mode: transmit audio from non-Bluetooth audio sources (TV, PC, TV Box, CD / DVD player, projector, etc.) to Bluetooth headphones / speakers. Receiver mode: transmit audio from Bluetooth audio sources (smart phone, tablet, Bluetooth TV/PC, game machine, amplifier, etc.) to non-Bluetooth headphones / speakers / car / home stereo system. Optical + 3. 5mm Aux Input/ Output. Dual optical interface+3.5MM audio interface+RCA red and white conversion interface,Easily realize the use of different power amplifier audio equipment, Both audio input and output are supported. *The product can be used with X-Box (optical digital connection only). Dual Link Music Streaming. Connect 2 Bluetooth headsets / speakers simultaneously to your TV to share the movie in transmitter mode, or pair 2 devices to your home stereo system to stream music in receiver mode at the same time. Automatically connect to your previously paired devices at power-up. Bluetooth 5.0 + EDR. Built-in DSP, restore CD-level high-fidelity stereo sound quality, Bluetooth V5.0 version make our wireless audio adapter enables more stable connection and low Latency with devices and achieve a range of up to 30ft (10m). Portable and Power Indicator. Small and exquisite, easy to carry, two-stage design, combination of matte and mirror, more fashionable and beautiful,With power indicator light, you can know the working status at any time, which is convenient for you to use. Specification Bluetooth Version: V5.0 Bluetooth profiles: AVRCP, A2DP Audio Jack: 3.5mm + Optical Battery Capacity: 300mAh Multi-point connection: Dual Link Wireless Range: 33ft/10m (no obstacle) Product Size: 2.5*2.5*0.7 inches