This Walkie Talkie supports VOX function to free your hand when driving, cycling, etc. And with 9 squelch levels, it offers crisp and smooth sound. Besides, it offers LED flashlight for emergency lighting, volume knob and LED display. Feature: Hands Free Once enable VOX function, just speak to the radio and it will begin broadcasting automatically, no need to press PTT button. Noise Reduction Adjust the squelch level (0 to 9) to mute background sound to some extent and bring yourself crisp and smooth sound. Humanized Design You can turn on LED flashlight for emergency lighting. And with knob, easy to adjust volume quickly. LED Display Easily get to know the operating channel, frequency, signal strength, remaining power, etc. Long Lasting Battery With built-in 8800mAh lithium battery plus battery saving function, you can use it for a long time. Specification: Color: Red, Blue, White, Black (Optional) Frequency range: 136-174MHz(Rx/Tx) 400-520MHz(Rx/Tx) Max range: 5-10KM Memory channels: Up to 128 channels Frequency step: 2.5/5/6.25/10/12.5/25KHz Supply voltage: Rechargeable Lithium-Ion 7.4V Battery Capacity: 8800mAh Item size: 110* 58* 32mm/ 4.33* 2.28* 1.26in Packing list: 1 * UV-10R Walkie Talkie 1 * Battery pack 1 * Power Adapter 1 * Antenna 1 * Headset 1 * Lanyard