1. It can be connected to speakers or headphones that support Bluetooth (A2DP protocol) in TX mode, or to a mobile phone or computer in RX mode. 2. Supports BTI-029 dual-stream functionality, allowing one device to connect to two speakers or headphones simultaneously for synchronized audio playback. BTI-029 also supports multipoint connection. 3. Compatible with aptX and other audio codecs. 4. BTI-029 supports both optical (TOSLINK) input and output. 5. Supports A2DP and AVRCP protocols. Can pair with Bluetooth speakers or headphones that support A2DP to create a wireless audio transmission setup for use with TV, CD players, home theater systems, etc. Can also connect to mobile phones or computers for music playback. Specifications: - Bluetooth version: V5.0 - Transmission power: Class II, up to 10 meters range (actual range may vary depending on connected devices) - Frequency range: 2.402 ~ 2.480 GHz - Memory unit: 16M Flash - Supported Bluetooth pairing codes: 0000, 1111, 1234, 8888 - Receive mode usage time: Approximately 15 hours via AUX - Transmit mode usage time: Approximately 15 hours via AUX - Receive mode usage time: Approximately 12 hours via SPDIF - Transmit mode usage time: Approximately 12 hours via SPDIF - Charging time: Approximately 2 hours - Charging input: 5V DC, 300mA or higher - Battery: 350mAh Li-ion polymer rechargeable battery - Operating temperature: -10C to 55C - Color: Black - Material: Metal + Plastic - Dimensions: 60 x 60 x 18.4mm Package Contents: 1 x Bluetooth Adapter Note: Lighting and display settings may cause slight color variations between the product image and the actual item. Measurement tolerance: +/- 1-3 cm.