Description:  •Frequency measurement function, copy the frequency of other devices at any time.  •1.6-inch screen,Fashlight lighting function,FM,NOAA(Only for RA85).  •USB charging function, you can use the USB charging cable to directly charge the two way radio.     RA685 Features:  1. Frequency range: 144-146MHZ(RX/TX) 430-440MHZ(RX/TX).  2. Dual band, Dual Display, Dual Standby.  3. High, middle, and low power switching to meet the power requirements of users at different distances, more energy-saving and power-saving.  4. Up to 128 memory channels for programming frequency and other various data.  5. Multiple display modes such as channel number, frequency, channel frequency, channel name, etc.  6. CTCSS/DCS, DTMF signaling, reject redundant calls from other stations.  7. The tail tone is eliminated to avoid the impact noise from the speaker after the call is over.  8. V0X voice-activated transmission, no need to press the PTT button to talk normally.  9. Emergency alarm, ANI identification and other functions through DTMF.  10. DTMF, CTCSS (60.0 -259.9 HZ), DCS signaling codec function.  11. 8 step frequency selection (2.5K, 5.0K, 6.25K, 10.0K, 12.5K, 20.0K, 25.0K, 50.0K).  12. Automatic power saving function to extend battery life.  13. SOS emergency alert function.  14. Computer programming function.  15. Wide/narrow band (25KHz/12.5KHz) selection function.  16. Digital FM radio (receiving 65-108MHz).  17. Direct selection of keyboard numbers for menu items, the transmit and receive frequency can be manually input.  18. Special CTCSS/DCS (frequency hopping function).     Specification:  Frequency Range: 144-146MHZ(RX/TX) 430-440MHZ(RX/TX).  Channel No.: 128.  Channel Spacing: 25/12.5kHz.  Input voltage: 7.4 VDC.  Battery (standard configuration): 1800mAH(Li-Ion).  Battery Life(5-5-90, High power transmission): About 14 Hours.  Current:  Standby: ≤65mA.  Receive: ≤450 mA.  Transmit: ≤1.8 A athigh power, 850 mA at low power.  Frequency stability: ±2.5ppm.  Operating temperature: -20℃ to +60℃.  Antenna impedance: 50Ω.  Walkie-talkie size(With battery, but without antenna): 121×61×33mm.  Walkie-talkie weight(Including antenna and battery): 223g.  TRANMIT PART:  Transmit output power: 5W/3W/1W.  Modulation: 16K0F3Eat25KHz, 11K0F3Eat12.5KHz.  Spurious emission: -36dBm＜1GHz, -30dBm＞1GHz.  FM signal-to-noise ratio: 45dBat25KHz, 40dB at12.5KHz.  Audio distortion: ≤5%.  Modulation limit: ±5.0 KHzat25 KHz, ±2.5 KHzat12.5 KHz.  Adjacent channel power: 70dB at 25KHz, 60dB at 12.5KHz.  (300-3000Hz) Audio response: +1~3dB.