Specification: Material: Pin Color: Blue Power Supply: Battery 【Rechargeable Walkie-Talkie】This walkie-talkie features a 1200mAh rechargeable lithium-ion battery, allowing for daily use at low cost. After a quick charge via the USB Type-C charging cable, the walkie-talkie can remain in standby mode for 3-4 days. You can charge your walkie-talkie in many ways, such as power bank, car charger, 5V USB charger, etc. [SECURITY] This adult walkie-talkie boasts 16 channels and 121 privacy codes. Its speaker is only activated by a signal from a walkie-talkie on the same channel with the same privacy code. This allows for easy and private communication with any other license-free devices on the market. [Full Functionality] This rugged walkie-talkie offers highly useful features including VOX (voice-activated transmission), auto channel scan, auto channel memory, auto save function, battery, low battery alert, keypad lock, busy channel lock, automatic squelch, etc. 【Long-Range Walkie-Talkie】This walkie-talkie has a communication range of up to 25 kilometers between two hills and up to 2 kilometers within a building. Obstacles, how the unit is held, frequency, and weather conditions can affect the signal range. It is recommended to hold the radio vertically and use the unit at a high elevation for the best experience. 【Easy to Use】The compact and lightweight walkie-talkies feature a large backlit LCD screen, making them easy to use for children, adults, and seniors. They are also suitable for various outdoor and indoor activities such as cycling, camping, hiking, and adventure games.