RETEVIS RB637 EU Frequency PMR446 16CHS License-free Two Way Radio Handheld Bluetooth Walkie Talkie 1. Unique design, with large-caliber decorative (illumination) lights, easy to operate, and good sound quality 2. One-key parameter function wireless copy, no need to batch or use PC software to write frequency for each 3. CTCSSDCS signaling, effectively avoiding redundant calls from other stations 4. The tail tone is eliminated to avoid the impact noise from the speaker after the call is over 5. 9-level VOX voice control launch, normal conversation can be done without PTT button 6. 9 levels of squelch, real-time adjustment of the ideal call environment 7. TYPE-C charging interface to avoid plugging and unplugging troubles 8. Frequency range: PMR446 9. Channel number: 16CH 10. Channel interval: 12.5KHz 11. Standby current: less than or equal to 20mA 12. Antenna impedance: 50 ohms 13. Rated voltage: 3.7V 14. RF power: high: 2W low: 0.5W 15. Audio distortion: less than 5% 16. Frequency stability: +-2.5ppm 17. Frequency deviation: less than or equal to 5KHz2.5KHz