1. Use the digital mobile radio (DMR) layer 2 standard protocol. It is compatible with other brands and models of popular MOTO TRBO series Tier I and II that use standard encryption and other DMR-enabled radios. It is also compatible with any existing analog two-way radios operating on supported UHF and VHF frequencies and can be easily ported to digital technology 2. Kill/stun and activate remotely 3. With GPS, emergency alert, VOX, TOT, (TDMA) digital, encryption and other functions 4. Frequency: 136-174&400-480MHz 5. Channel: 3000 6. Frequency stability: +/-1ppm 7. Working temperature: -30~+60 degrees Celsius 8. Working voltage: 7.4V DC 9. Battery capacity: 2000mAh 10. Antenna impedance: 50 ohms 11. Audio impedance: 1W @16 ohm 12. Channel spac