specification1. Measurement range: 0~25% VOL2. Maximum overload: 30% oxygen3. Response time: <15 seconds4. Sensor type: electromagnetic O2 sensor5. Use ambient humidity: 15~90% RH6. Power: 3X1.5VAA battery Package Included1 x Oxgen gas detector (without battery)1 x manualSpecification: General Certificate CE Package Weight One Package Weight 0.86kgs / 1.90lb One Package Size 28cm * 21cm * 7cm / 11.02inch * 8.27inch * 2.76inch Qty per Carton 7 Carton Weight 7.00kgs / 15.43lb Carton Size 48cm * 32cm * 24cm / 18.9inch * 12.6inch * 9.45inch Loading Container 20GP: 723 cartons * 7 pcs = 5061 pcs 40HQ: 1679 cartons * 7 pcs = 11753 pcs