Equipped with productive anti-noise handheld transmitter factory and company, Fenghuo Hongsheng is one of the leading China military radio handheld manufacturers and suppliers. Welcome to contact us. Model OZCK-1 Noise-cancelling Handheld Transmitter is the audio terminal for various communication equipments to transmit voice signal, such as base station or vehicle-mounted radio set. It has the advantages of anti-noise, clear voice, high reliability, weather-proof ,etc.. Main Technical Specifications: Operating temperature: -40℃～+55℃  Dimensions: 139mm×72mm×34mm  Weight≤250g  Frequency range: 200Hz～4000Hz  Operating voltage: 12V DC  Impedance: 450(1±15%)Ω (1000Hz)  Average sensitivity : (84～168mV/Pa)can be adjusted between 1.5mV/Pa and 400mV/Pa  S/N≥10dB (12V DC is added, when it is 1000Hz)