Technical SpecificationPower:AC 220V(or 110V) 50Hz; DC 12V/1.2AHSpeaker :16cm,35W/4Frequency Range: VHF 165-265MHz(98 groups for option)Sensitivity :10dB V(S/N:60dB above)Oscillating Mode:0.005% quartz control phase lockedWireless effective range:35 metersDimension:230X165X320MM