Item Type: Audio Transmitter and Receiver Material: ABS, PCB Maximum Transmission Distance: 50m Receiver Battery: 250mAh Lipo Battery (Built in) Standby Battery Life: 7 Hours Charging Voltage: 5V 200mA RF Frequency: 2400Mhz Transmission Power: 14DB Signal to Noise Ratio: 67DB Frequency Range: 20Hz to 14.5KHz Sampling Rate: 44.1KHz to 96KHz 24 Bit Supported Audio Formats: AC 3, DTS, PCM Maximum Output Level: 1.75Vp-p Operating Temperature: -40 to 85 Storage Temperature: -60 to 120 Operating Environment Humidity: -10 to 90% RH (Non Condensing) Storage Environment Humidity: -5 to 95% RH (Non Condensing) Package List 1 x Receiver 1 x Transmitter 2 x USB Charging Cables 1 x Audio Cable 1 x User Manual 1Long Range Wireless Transmission: Using 2.4G technology to achieve highly clear audio quality without delay transmission. With a maximum distance of 50 meters, you can enjoy wireless audio without being restricted by cords. 2Multi Purpose Transmitter: The transmitter can convert fiber optic, AC 3, DTS, PCM digital audio signal inputs into 2.0 analog stereo audio signal and transmit it to receiver at a distance of 50 meters. Also supports R L stereo input. 3Convenient Design: This wireless audio transmission system can solve the tedious operation problem of repeatedly switching or setting output audio, the format of signal sources, and the problem of disorderly cable binding. 4Long Standby: The receiver comes with a built in battery that can last up to 7 hours on standby, allowing you to enjoy wireless audio on the go. 5Wide Application: This wireless audio extender kit can be widely used in home audiovisual, schools, electronic game fields, and other places.