Function 1. Monitoring: Enhance speech when the signal is too weak to hear clearly. 2. Squelch level: 0-9 levels, help you suppress background noise, improve signal sensitivity and sound clarity. 3. VOX: Let you free your hands when you are busy, adjust the VOX level to control background noise. 4. Scan: You can find the right call frequency and join the call easily and quickly. 5. Voice prompts: functions and features are simple and easy to understand; voice confirmation when selecting is very suitable for new users. Specifications Mode: US, EU, AU, UK Call Range: 3-5KM Memory Channels: 128 Channels Walkie Talkie Type: Convenient Maximum Range: 5KM-10KM Material: Plastic Frequency Range: VHF 136-174 MHZ, UHF 400-520 MHZ Size: 5.8 x 1.1 x 3.2 cm Material: ABS Color: Black Size: 18 x 11 x 9.5 cm Weight: 420 g Package Includes: Host Antenna Lanyard Back Clip Earphone Charger Instruction Manual (Battery not included in shipment!)Note: 1. Actual color may be slightly different from the image due to different light effects. 2. Please allow 1-3cm deviation due to manual measurement!