Features: brand new and high quality Adapter: 2-in-1 receive and transmit. The 5.0 chip has a more stable connection, faster transmission speed, and lower power consumption. Small and portable, easy to connect, pairing function, one button operation, convenient and fast. Plug and for play drivers are not required; Supports for smart 5.0 built-in noise reduction and sound quality. 10 meters stable transmission signal; Fully supports automatic matching. Specifications: Input voltage: for DC / 5V Input interface: 3.5mm audio Transmission distance: 10m Drive: no need to install Charging time: 1 hour for Play time: 5 hours Protocol: A2DP / avctp / avdtp / AVRCP Battery: 501535 3.7V-4.2V lithium battery (220mAh) Transfer line length: 4.5cm USB cable length: 45cm Fuselage: approx. 7.8x2.3x1.5cm/3.07x0.91x0.59in Note: Due to the monitor difference and light effect, the actual color of the item may be slightly different from the color shown on the pictures. Thanks! Please allow 1-2cm measuring deviation due to manual measurement. Package includes: 1 X Transmitter Receiver 1 X Charging Cable 1 X Instruction