Features: High precision, respond quickly. Stable performance, high accuracy. Auto-power off. Compact portable size, easy to use. 2.7" large LCD screen displays data clearly. Push button to switch on green backlight. Rechargeable lithium battery is included. For home use, agriculture, chemical industry, etc. Specifications: Material: ABS Voltage: AC100-240V, 50/60Hz Output: DC5V5%, 100050mA Measuring Range: 0~100PPM Resolution: 0.1PPM Temperature: -10~50 Resolution: 0.1 Power Supply: 1 * 3.7V, 1000mAh rechargeable li-ion battery Screen Size: 4.4 * 5.3cm / 1.73 * 2.08in Storage Box Size: 23 * 20.5 * 5cm / 9.06 * 8.07 * 1.97in Item Size: 18.1 * 6.3 * 3cm / 7.13 * 2.48 * 1.18in Item Weight: 235g / 8.29oz Package Weight: 735g / 25.92oz Package Size: 25.5 * 21 * 5.7cm / 10.04 * 8.27 * 2.24in Package List: 1 * Detector 1 * USB Cable 1 * Storage Box 1 * Manual (English)