Equipped with productive portable wireless communication unit factory and company, Fenghuo Hongsheng is one of the leading China portable wireless communication unit manufacturers and suppliers. Welcome to contact us.portable wireless communication unit is full duplex wireless communication, equipped with hanging ears handset group, easy to carry and can be fixed by card buckle is convenient in safety helmet, side effect is good, call voice clear, suitable for short distance voice communication between workers.the component of productportable wireless communication unit      1set;Lithiumion battery charger                       1set;antenna                                                   1set.Earplug transmitter receiver                    1set.product characteristics and the main functionProducts using the digital speech enhancement technology, microphone can be sensed in noise environment noise signal filtering, using full-duplex mode and call voice activation, that words can be completed at the same time send message function, receive an unlimited number of user and using the technology of voice PTT said without any operation, easy to use, communications within the product group, allow at most four people talking at the same time.Also the products with channel selection, volume control, voice prompt operation, the battery voltage detection, since listening, and other functions, has a strong confidentiality, voice communication and flexible, high system stability, voice clarity and high fidelity, etc. Main Technical Specifications:Operation frequency band:900MHz;Power supply:DC3.6V Lithium-ion battery;TX power≥20dBm;volume: 5channel number:10;continuous working time≥8h;transmission distance≥500m(open area);audio output≥90dB;earmuffs sound insulation quantity≥25dB (315Hz～8000Hz);working temperature:-25℃～45℃;storage temperature:-40℃～60℃;max. dimensions:280mm×270mm×260mm;weight:≤450g(No batteries).