Specification: Describe: Transmitter + receiver 2 in 1. Charging port: Type-C 5V. Bluetooth version: 5.0. Transmission distance: 10M. Charging time: 3 hours. Battery: 500mAH lithium battery. Working time during TX transmission: 24H. Working time during RX reception: 21H. Feature: Support 1 to 2 (TV can be connected to 2 Bluetooth headsets); Transmitting and receiving can be switched in a dual mode, HIFI-level sound quality; for aptX-HD lossless HIFI CD-level sound quality transmission. Feature: STREAM AWAY: Bluetooth-enable your TV, PC / Laptop or other favorite device and wirelessly stream to headphones With our unique 2-in-1 design, you can also use BTC880 as a receiver to Bluetooth-enable your favorite wired speaker, soundbar, home theater etc. MAGICAL MATCH: Compatible with 99% of TV's on the market, our BTC880 supports Optical / AUX and RCA audio output without extra wires to get in your way. NO MORE DELAY: Featuring for aptX Low Latency technology, BTC880 allows you to reduce Bluetooth delay - delivering high quality sound in perfect synchronization. Pair with your favorite pair of headphones also equipped with for aptX Low Latency technology. LONG BATTERY LIFE: Unlike other devices of it's kind, the BTC880 features a built-in battery that delivers up to 20 hours of playtime Feeling a little low? The battery fully charges within 2 hours. SIMPLIFY STREAMING: Our user-friendly interface allows you a clear visual of when the device is paired, and offers direct volume controls - making it simple to adjust the volume right from the device-instead of the actual TV or other audio source. 2-in-1 Bluetooth transmitter and receiver to Bluetooth-enable all of your devices. With a built-in battery and volume control right on the device, BTC880 once again delivers the ultimate audio experience. Recommended uses: Transmitter - Bluetooth-enable your TV, AV receiver, TV Box etc., or stream audio to any Bluetooth headphones / speakers. Receiver - Bluetooth-enable a wired speaker, soundbar, home theater etc. Receive audio wirelessly from any Bluetooth audio device e.g. PC, mobile phone, Echo, Echo Dot, etc. Supports Digital OPTICAL, RCA or AUX audio output ports. Compatible with 99% of TVs on the market. for aptX Low Latency supports both TX and RX mode. Supports streaming audio to two headphones at the same time. Uses for aptX low latency to eliminate lip sync delay. Note: Doesn't work / not recommended for: 1. Bypass / pass through function NOT supported. 2. Volume Control only works in AUX mode NOT in SPDIF (optical) mode. 3. When works with Beats headset, the headset volume control does not work. 4. Works as EITHER a transmitter or receiver - NOT both simultaneously. 5. For TV optical output - set audio format to PCM, as Dolby DTS is not supported. 6. Not compatible with ANY RCA output on the back of the AV Receiver / Amplifier. 7. for aptX Low Latency cannot be achieved in dual link. 8. If the one of your headphones is for Plantronics Backbeat pro II or Beast solo 3, then dual link is not recommended. 9. When using the transmitter, the TV internal speakers might not work or may become muted. This is TV dependent. 10.