Real-Time Audio Transmission: Bluetooth transceiver adopt the aptX Low Latency Technology in both TX & RX modes, which can reduce audio lag under 40ms and let you enjoy high-quality audio in sync with the picture (Your Bluetooth headphones or speaker must also support aptX LL / aptX as well.)

NOTED: If you want to use it to watch TV and watch movies on your PC,Please make sure your bluetooth headphones support APTX LOW LATENCY, Otherwise it will have a little sound delay.

Technical specifications:

Bluetooth version: V5.0, Class II
Battery: 600mAH rechargeable lithium battery
Net weight: about 45 g
Size: 63 x 63 x 20mm
Operating time in receiver mode: 22 hours
Operating time in transmitter mode: 26 hours
Charging time: 3 hours
Transmission range: within 10 m
Audio coding:
TX: aptX HD, aptX Low latency, aptX, SBC

RX: aptX HD, aptX Low latency, aptX, SBC, ACC

Package contents:
1 x Bluetooth Transmitter/Receiver Adapter
1 x Micro USB charging cable
1 x 3.5mm audio cable
1 x 3.5mm jack to 2 RCA plug cables
1 x Digital Optical Toslink Audio Cable
1 x user manual

Notes: 
1.Charging is necessary for first use. It can be fully charged for about 3 hours. The LED lights up red during charging and turns off when it is fully charged. 
2.The optical terminal and AUX terminal can not be used at the same time. Please note that digital output can not be done simultaneously when digital input.
3.In order to use aptX HD and aptX LL, your Bluetooth headphones and speakers need to have aptX HD and aptX LL function. Otherwise, codec will automatically be aptX or SBC.

What we could do:

1.Excellent OEM/ODM service
2.Quality guarantee:RMA rate is below 0.2%.
3.Timely shipment
4.Professional designer,follow up the market timely even be leadership 
What we provide:
1.One year warranty
2.After-sales service
3.Technology support
4.Quick delivery: Within 2days normal small order/7-15days for OEM&ODM
5.Sample cost is refundable at a bulk order