Equipped with productive transmitter-receiver handset factory and company, Fenghuo Hongsheng is one of the leading China military radio handset manufacturers and suppliers. Welcome to contact us. Model OSC-515 Transmitter-receiver Handset is suitable for being used as the audio terminal matched with various transceivers and civil communication equipments. The product has beautiful appearance, better environment adaptability and it is easy to operate. Main Technical Specifications: Operating temperature:-40℃～+55℃  Dimensions: 216mm×69mm×60mm  Weight≤300g  Frequency range: 200Hz～4000Hz  Transmitting impedance: 300 (1±30%)Ω(1000Hz)  Average sensitivity≥2.5mV/Pa  Receiving impedance: 300 (1±30%)Ω(1000Hz)  Receiving sensitivity≥110dB/mW Model OSC-W3 Transmitter-receiver Handset Model OSC-W3 Transmitter-receiver Handset is a suitable for every kind of radio set and communication equipment. It has the advantages of pretty shapes, easy operation, clear voice, watert-proof, moisture-proof, etc..  Main Technical Specifications: Operating temperature:-40℃～+55℃  Transmitting impedance: 150 (1±20%)Ω(1KHz)  Average sensitivity≥0.7mV/Pa(200～4000Hz)  Receiving impedance: 600 (1±20%)Ω(1KHz)  Receiving sensitivity: (106±2)dB/mW(200～4000Hz)  Transmitting impedance: 150 (1±20%)Ω(1KHz) Average sensitivity≥0.7mV/Pa(200～4000Hz)  Receiving impedance: 600 (1±20%)Ω(1KHz)  Receiving sensitivity: (106±2)dB/mW(200～4000Hz) Model OSC-13B Transmitter-receiver Handset Model OSC-13B Transmitter-receiver Handset can be used as the audio terminal for various radio sets and civil communication equipments. The product has the reasonable structure, and it is easy to operate; it also has the better performance of water-proof and moisture-proof.  Main Technical Specifications: Operating temperature: -40℃～+55℃  Dimensions: 198mm×70mm×53mm  Weight≤330g  Frequency range: 200Hz～4000Hz  Transmitting impedance: 2000 (1±30%)Ω(1000Hz) Transmitting sensitivity≥10mV/Pa (1000Hz) S/N≥8dB  Receiving impedance: 600(1±30%)Ω(1000Hz) Receiving sensitivity≥110dB/mW (1000Hz) Threshold undamaged power: 75mW  Model OSO-4 Transmitter-receiver Handset Model OSO-4 Transmitter-receiver Handset can be used as the audio terminal for various radio sets and civil communication equipments. The product is beautiful in appearance, easy to operate, and it also has better environment adaptability. Main Technical Specifications: Operating temperature: -40℃～+55℃  Dimensions: 220mm×51mm×49mm  Weight≤260g  Frequency range: 200Hz～4000Hz  Transmitting impedance: 300(1±15%)Ω (1000Hz) Transmitting average sensitivity: 1.8mV/Pa±0.6mV/Pa  Receiving impedance: 300(1±15%)Ω (1000Hz) Receiving average sensitivity: (105±3) dB/mW