1. Material: polycarbonate 2. Transmitting power: 8W 3. Battery capacity: 4800 mA 4. Working voltage: 7.4V 5. 128 channels 6. Applicable scenarios: service/catering/site/property/warehouse, etc. 7. Distance: 1-15 km 8. 1000 times drop test, improve the resistance to fall and impact 9. USB direct charge is possible 12. Size: about 19x6.1x2.9 cm 13. Weight: about 180 grams