1. Simple but versatile Concise appearance with nice and solid feel case， fits right in the hand. Tokmate TU30 is designed for the needs of various occassions such as construction and manufacture plants， resorts and hotels， public safety agency and government department， metro station and airport， etc. 2. Two knobs to switch channels and adjust volumeRotate the channel selection knob to switch the present channel from 1 to 16， there are numbers marked on it. ON/OFF knob also function as volume"+" and "-"， just turn it clockwise to open and increase volume， though the voice is really loud enough even in those environment full of noises. 3. Hard enough， shockpoof， dustproof， unique lock buckle on battery packThe whole body is compact and rigid in case any accidental falling or shocks， and splashing in rainy day won't be mattered. 1500mAh Li-ion battery last for 8 hours， if not transmitting frequently. In addition， battery buckle is placed on the battery pack unlike many other radios. It is a tiny trick， but now you don't have to throw the whole radio once such part is damaged， a new battery would solve it quickly. 4. CTCSS doesn't protect your privacy， but you won't feel annoyed nowThere are standard 50CTCSS and 105CDCSS to filter those channel jams while talking， only note that such settings won't protect you from being overheard， and side monitor button is helpful when signals are weak. VOX function makes you really handsfree， good solution for construction or driving on the way 5. Saving mode for longer performanceLeft non operation more than 5 seconds， TU30 would entre saving mode automatically. LCD and keypad are not available on this radio， which slows the battery drain down to a longer working. Please download its software to get your own channel programmed， see attached link as belowSpecification:General 1. Frequency Range: UHF 400-470MHz 2. Channel Capacity: 16 3. Channel Spacing: 25 KHz 4. Operated Voltage: 3.7 V 5. Battery: 1500MAh Li-ion 6. Battery Life(5-5-90 duty cycle): About 8 hours 7. Frequency Stability:±2.5ppm 8. Operated Temperature: -30°c-+60°c 9. Antenna Impedance: 50Ω10.Communication Range: about 6km11.Dimensions:125×60×36mm 12.Weight (with battery/antenna): 175gTransmitter 1. RF Power Output 2. Modulation: 3W 4. Spurious Emission:≤65dB 5. FM Noise: ≤-45dB(W) ≤-40dB (N) 6. Audio Distortion: ≤5% 7. Transmitting Current: ≤1.3AReceiver 1. Sensitivity (12dB SINAD): ≤0.20 uV 2. Selectivity: 55dB/50dB 3. Intermodulation: ≥65dB 4. Adjacent Channel Selectivity: ≥60dB 5. Spurious Response: ≥60dB 6. FM Noise: 45dB/40dB 7. Audio Power Output: 1000mW 8. Audio Distortion: ≤5% 9.Standby Current: ≈15mA (with battery save on)Package contents:1x Tokmate TU30 Two-Way Radio Body (one 1500mAh Li-ion battery included)1x Antenna1x Belt Clip1x Battery Charger1x User Manual