Features:1. A lightweight and compact communication device2. Provide you clear and loud sound3. Can be used to keep communication with partners or workmates4. Built with 1500mAh large capacity battery, 40-48 hours long working time5. Prevent users from receiving unauthorized signal and avoid the interference channel6. Up to 10km working range in open areas7. Suitable for many occasions, such as airports, manufacturing plants or concerts etc.Specifications:1.