4 Pack Vacuum Cleaner HEPA Filters for Cyclonic Series RO3753EA RO3731EA RO3786EA Features<br> 1. Monitor: Enhances speech when the signal is too weak to be heard.<br> 2. Squelch level: 0-9 levels, help you suppress background noise, improve signal sensitivity and sound clarity.<br> 3. VOX: Allows you to free your hands when you're busy, and adjusting the VOX level controls background noise.<br> 4. Scanning: You can find the correct frequency you are talking on and join communications easily and quickly.<br> 5. Voice Prompts: Functions and features are easy to understand; voice confirmation on selection is ideal for new users.<br> Specification<br> Pattern: US, EU, AU, UK<br> Calling range: 3-5KM<br> Storage channels: 128 channels<br> Walkie Talkie Type: Convenient<br> Maximum range: 5KM-10KM<br> Material: Plastic<br> Frequency range: VHF 136-174 MHZ, UHF 400-520 MHZ<br> Dimensions: 5.8 x 1.1 x 3.2 cm<br> Material: ABS<br> Color: Black<br> Size: 18 x 11 x 9.5 cm<br> Weight: 420 g<br> Package Include:<br> Main unit<br> Antenna<br> Lanyard<br> Back clip<br> Battery<br> Earphone<br> Charger<br> Instruction manual<br> Headset