This mask is an ear strap type with a valve design. The soft inner lining makes people feel uncomfortable when wearing it, and the design with a valve also reduces people's breathing resistance and makes breathing smoother.
Radar stealth bulletproof glass is a high-tech glass product that combines the functions of bulletproof and radar stealth. The product has a special coating that can absorb and scatter radar waves, making it difficult for radar to detect.
1) 400-470MHZ full broadband (frequency range, and people more wide frequency more convenient, compatibility stronger),2) The hand (ChiJi 5W high power, call distance is more security),3) The radio functions: can automatic, also can direct input frequency