Professional walkie talkie. Each walkie talkie has 16 preset channels, all two-way radios must be on the same frequency, press the PTT button to speak. Adults and children can use it easily. In some cases, two-way radios have more stable signals than mobile phones, especially in remote areas or areas with weak signals. Loud and clear loudspeaker and microphone: The two-way radio has DCS and CTCSS functions that automatically block other loud noises and signals. The radio only transmits and receives your voice, and the high-quality speaker and microphone make communication clearer. Each walkie-talkie comes with a headset and belt clip, so you can talk hands-free directly through the headset microphone. 1500 mAh Li-ion battery. Each two-way walkie-talkie battery can be charged directly with a Type-C charging cable. The battery can be charged separately in the charging station or mounted on the walkie-talkie to charge together, which is very convenient. Rechargeable walkie-talkies can be used for about 8-12 hours on a full charge, but charging time is only 3-4 hours. The walkie-talkie automatically beeps when the battery is low. High quality & certificationRobust housing; Compact and lightweight; Excellent performance; Integrated sensitive antenna; Stable signal; Built-in LED light/torch. This portable transceiver is suitable for camping, hiking, warehouse work, construction sites, security work and so on. VOX function: Long-range two-way radios with automatic detection and transmission of voice (VOX) function, hands-free calling, no need to press the PTT button to speak. If you have any questions when purchasing, please do not hesitate to contact us. Specifications Frequency range: UHF 400-470 MHz Channel capacity: 16 Channel spacing: 25 kHz Operating voltage: 3.7 V Battery: 1500 mAh Li-ion Battery life (5-5-90 duty cycle): approx. 8 hours Frequency stability: ±2.5 ppm Operating temperature: -30°C to +60°C Antenna impedance: 50 Ω Dimensions (L x W x H) (with battery, without antenna): 120 x 58 x 33 mm Weight (with battery/antenna): 175 g FM function: NO