Power supply: DC 7.4V / 2.2 Ah built in lithium battery
External power: DC 12V - 2.5A; DC 9V - 1.5A
RMS power: 20 Watt maximum
THD: < 1%
Speaker: 1 piece double coil full range 6.5" loudspeaker
Input: One 6.35 wired microphone input; One AUX input; One external DC 12V/2.5A power input; One external DC 9 V/1.5A power input
Output: One 8 Ohm speaker output; One AUX output
RF Channel: Dual Channels
Frequency range: UHF 470-980 MHz
Wireless service range: 80 meter maximum
Operating temperature: -25°C to 45°C
Built in features: USB/SD card play MP3 & record function; FM function