Features: brand new and high quality It can fast and stable transmission without tangling. Support A2DP protocol. Support codec such as SBC, apt-X, apt-X ll, apt-X for Hd, AAC (Rx), FS (TX) and so on. Supported bluetooth-compatible speaker or headset pairing security for key is 0000,1111,1234,8888. The adapter can transfer bluetooth-compatible music on mobile phones, computers, PADs, and transfer the music to devices with AUX, SPDIF audio input interfaces, such as vehicles or stereos, through the product's bluetooth-compatible receiving function. Transforms your audio sound systems into wireless and bluetooth-compatible compatible speakers with just one, easy to use. With SPDIF, aux audio interface,it's compatibility and versatility. Specifications: Material:ABS Color:Black Battery Capacity:500mAh Size:6x6cm/2.36x2.36in Bluetooth-compatible Version: V 5.0 Cable Type:AUX,USB Charging Input Requirements:5V for DC ≥500MA Charging Time:About 3hours Receiving State Usage Time:＞20hours Transmit State Usage Time:＞20hours Operating Range: up to 33 feet (10 meters accessibility) Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 X Audio Adapter 1 X Optical Cable 1 X 3.5mm Audio Cable 1 X USB Charging Cable 1 X 3.5mm Male to RCA Male Cable