Features1. Monitor: Enhances speech when the signal is too weak to be heard.2. Squelch level: 0-9 levels, help you suppress background noise, improve signal sensitivity sound clarity.3. VOX: Allows you to free your hs when you're busy, adjusting the VOX level controls background noise.4. Scanning: You can find the correct frequency you are talking on join communications easily quickly.5. Voice Prompts: Functions features are easy to underst; voice confirmation on selection is ideal for new users.SpecificationPattern: US, EU, AU, UKCalling range: 3-5KMStorage channels: 128 channelsWalkie Talkie Type: ConvenientMaximum range: 5KM-10KMMaterial: PlasticFrequency range: VHF 136-174 MHZ, UHF 400-520 MHZDimensions: 5.8 x 1.1 x 3.2 cmMaterial: ABSColor: BlackSize: 18 x 11 x 9.5 cmWeight: 420 gPackage Include:Main unitAntennaLanyardBack clipBatteryEarphoneChargerInstruction manualHeadset