Takstar UHF wireless tour guide system Teach Train Visit Tourism TAKSTAR UHF-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. 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: < 1% Transmitter power: 10mW Input level: valid values of 500 MV The transmitter power supply: 2 x 1.5V AA alkaline batteries The receiver power supply: battery, 5th section Package contents: 1 Transmitter 3 Receiver 1 Headset Mic 3 Earphone 1 Adaptor Plug 1 Audio Cable.The item "Takstar wireless tour guide system Teach Train Tourism 1 Transmitter 3 Receiver" is in sale since Friday, February 21, 2014. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Microphones & Wireless Systems". The seller is "superstore201" and is located in hongkong. This item can be shipped worldwide.