Features: 3-10 km communication distance, suitable for hotels, shopping malls, underground parking lots, property communities, construction sites, etc. 16 channels, one-key switching, fast pairing with other walkie-talkies, and quick pairing is successful. Sensing antenna, high-power penetration, more stable signal, more comfortable communication, and effectively improve the stability and penetration of the signal. Built-in 1700mah rechargeable battery, long-lasting battery life, support USB charging, more convenient. High-strength non-slip shell, anti-drop, high temperature, low temperature, durable. Specifications: Model: N7 Frequency range: 430-440MHz Channel capacity: 16 Narrowband/Broadband: 12.5KHz/25KHz Battery capacity: 7.4V 1700mAh Color: Black Grey; Black Blue(Optional) Item size: Approx. 10.5*5.5*3cm/4.13*2.17*1.18in Item weight: 181g/6.38oz Package size: 19*9*5cm/7.48*3.54*1.97in Package weight: 311g/10.97oz Package List: 1 * Walkie Talkie 1 * Battery Pack 1 * Charging Cable 1 * Antenna 1 * User Manual