Features: High precision and fast response. Stable performance and high precision. Automatic shut-down. Compact size, easy to carry and easy to use. The large 2.7-inch LCD screen displays data clearly. button turns on the green backlight. Contains rechargeable lithium battery. Suitable for household, 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 * 3.7 V, 1000mAh rechargeable lithium battery Screen size: 4.4 * 5.3cm / 1.73 * 2.08 inches Storage box size: 23 * 20.5 * 5 cm / 9.06 * 8.07 * 1.97 inches Product size: 18.1 * 6.3 * 3 cm / 7.13 * 2.48 * 1.18 inches Item weight: 235 g / 8.29 oz Packing weight: 735 g / 25.92 oz Packing size: 25.5 * 21 * 5.7 cm / 10.04 * 8.27 * 2.24 inches Packing list: 1 * Detector 1 * USB cable 1 * Storage box 1 * Manual (English)