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Zastone X6 Rechargeable Long Range Two-way Radios with Earpiece 4 Pack UHF 400-470Mhz Walkie Talkies Programming Cable includedGeneral Specifications Frequency Range:UHF 400-470MHz Channel Capacity:16 Channel Spacing:25KHz Operated Voltage:3.7 V Frequency Stability:±2.5ppm Operated Temperature:-30°c-+60°c Antenna Impedance:50Ω Dimensions (L×W×H) (with battery,without antenna):110×50×32 mm Weight (with battery/antenna):198g Transmitter Spurious Emission:≤65dB FM Noise:≤-45dB(W) ≤-40dB (N) Audio Distortion:≤5% Transmitting Current:≤1.3A Receiver Sensitivity (12dB SINAD):≤0.20 uV Selectivity:55dB/50dB Intermodulation:≥65dB Adjacent Channel Selectivity ≥60dB Spurious Response:≥60dB FM Noise:45dB/40dB Audio Power Output:1000mW Audio Distortion:≤5% Standby Current:≈15mA (with battery save on) Package contain: 4*Two Way Radio 4*Battery 4*Belt Clip4*Instructions 4*Earpiece