Takstar UHF wireless tour guide system Teach Train Visit Tourism TAKSTAR 938 The UHF (Ultra High Frequency) is designed with PLL (phase-locked loop) control, so the working frequency will be more stable; It supports independent microphone input and an external audio source such as CD, MP3; It can be used one-to-one or one-to-more, and the numbers for receiver can be enlarged according to your needs;It supports the mute function when there is no signal for the receiver;You can adjust the volume with the adjustment button. 1.Antenna 2.Power switch 3.Power indicator 4.AUX in Socket 5.Mic in Socket 6.Battery cover 7.Belt-clip Receiver: 1.Antenna 2.Power switch 3.Power indicator 4.Output Socket 5.Volumn Control 6.Battery cover 7. Belt-clip Specifications: Transmitter Frequency control: Phase Locked Loop Carrier Frequency: 433MHz Modulation Mode: FM Input Level: Virtual Value 500mV The frequency response: 60Hz-15kHz The SNR: >45dB (at 1kHz) Total non-linear distortion: Package contents: 1* Transmitter 1* Receiver 1* Headset Mic 1* Earphone 1* Adaptor Plug 1* Audio Cable