Single Transducer, large-scale, wide angle versionMicro-controller controlled frequency sweeping from 20Hz-55kHzFully Automatic time and high-low duty frequency adjustment.Built in single, wide range, high frequency transducerApplicable transmission angle is 160Wide angle transmission fully cover the control areaSpecifications1.Power supply: 220v/50Hz2.Output power: 7.8w (max)3.Output frequency-KQ500A: 20kHz-55kHz (automatic frequency sweeping)-KQ500B: 13kHz-50kHz (automatic frequency sweeping)-KQ500C: 60kHz-100kHz (automatic frequency sweeping)4.Emission Angle: 1605.Coverage area: More than 200-300 sq meter (open area)6.Dimension: 145x95x105mm7.Weight: 0.87kgPacking content:Instruction Manual 1pcFAQ 1pc12v 500mA Ac/Dc adaptor 1pcApplication Area:Small warehouse, restaurants, pharmacy etc.Remarks:1)Model KQ 500B is audible by human ears because of broadband frequency generated2)The other specification are same as KQ500A3)KQ500C is special for insect repelling