The COM-ART is a PLL UHF wireless audio set. It contains one transmitter and one receiver. The smart and lightweight design enables you to plug the receiver directly on any amplifier or active speaker. Both transmitter and receiver can be powered by one AA battery or a USB power supply. It has a range of up to 50 meters in an ideal situation. To use the COM-ART for stereo purposes you will need 2 sets. The frequency range 606-630 MHz is divided into 16 frequency channel presets. Battery poweredUp to 50m (line of sight)Receiver & Transmitter16 Channels SpecificationsFrequency: 606-630 Mhz Channels: 16RF Power: 10mW (transmitter)Freq response: 30Hz – 17KHz (+/-3dB)Distortion: 1KHz 98dBBattery power: 1x AA(LR6) 1.5VBattery life: >5 HoursPower supply: Mini USB 5VDC 80mA Dimensions114 x 22 x 23 mm Weight0.033 kg