1. Multiple alarm modes, real-time feedback of gas test2. 2.3-inch high-definition color screen display, multi-interface display, all data are clear at a glance3. Built-in smart menu, convenient operation4. Fast warm-up, support Chinese and English switching menu, multiple alarms, highly sensitive probe5. Rugged aluminum portable tool case6. Sturdy alligator clip on the back7. Measuring range: Combustible gas, oxygen, carbon monoxide8. Battery capacity: 1800mah / 3.7v9. Power supply mode: USB charging10. USB port with protective cover11. Description: GT8211: Oxygen content detector, GT8212: Carbon monoxide detector, GT8210: Flammable gas detector12. Application: Gas detection13. Alarm method: Sound, light, vibrationSpecification: Package Weight One Package Weight 1.04kgs / 2.28lb One Package Size 18.5cm * 28cm * 8cm / 7.28inch * 11.02inch * 3.15inch Qty per Carton 20 Carton Weight 19.00kgs / 41.89lb Carton Size 42cm * 57cm * 40cm / 16.54inch * 22.44inch * 15.75inch Loading Container 20GP: 278 cartons * 20 pcs = 5560 pcs40HQ: 646 cartons * 20 pcs = 12920 pcs