Description: Our small and compact system requires no complicated setup and wireness as long as you put them on the same channel, transmitter can match multiple receivers.Because it automatically pairs the transmitter and receiver when powered on. Up to 5 systems can be used at the same time.Specification: Frequency range: 570-590MHzAdjustable channel: 16 adjustable frequency pointsChannel Spacing: 0.5-2.5MHzModulation : DQPSKFrequency stability: 3PPMFrequency Response: 40Hz-20KHzWorking range: 50-80MBuilt-in battery: 800mahDuration: 7 hours of battery lifeAntenna Impedance: 50Sex to dry ratio: 110dBOperating voltage: built-in 3.7VSupported microphone types: dynamic microphones and 48V condenser microphones.Material: abs+metalcolour: greyPackage Contents: 1 x receiver1 x transmitter1 x conversion head1 x charging cableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.