RETEVIS RT87 136-174MHz + 400-480MHz 128CHS Waterproof Dual Band DTMF Two Way Radio Handheld Walkie Talkie, EU Plug 1. Functions: CTCSS&DCS, monitoring function, emergency alarm, scanning, TOT (timeout timer), squelch, VOX, power saving, low battery prompt, etc. 2. IP67 waterproof and dustproof function 3. Frequency VHF: 136-174MHz, UHF: 400-480MHz 4. Channel capacity: 128 5. Working voltage: DC7.2V (lithium ion) 6. Frequency stability: +-2.5ppm 7. Antenna impedance: 50 ohms 9. Dimensions (with battery, without antenna): 114x54x32mm 10. Weight (including battery and antenna): 194g Transmitter: 1. Output power: H: less than or equal to 5W, L: less than or equal to 1W 2. Deviation: less than or equal to 5KHzless than or equal to 2.5KHz 3. Adjacent channel power: less than or equal to -65dB less than or equal to -60dB 4. Stray radiation: less than or equal to 7uW 5. Pre-emphasis characteristics: 6dB 6. Current: less than or equal to 1.6A 7. CTCSS-DCS deviation: 0.5KHz±0.2KHz, 0.4KHz±0.2KHz 8. Intermediary sensitivity: 5-12mV Receiver: 1. RF sensitivity: -122dBm (12dB SINAD) 2. Audio power: 1W 3. Audio distortion: less than 5% 4. Barrier: greater than or equal to 85 5. Intermediary: greater than or equal to 60dB greater than or equal to 55dB 6. Selectivity: greater than or equal to 65dB greater than or equal to 60dB 7. Spurious suppression: greater than or equal to 60dB