Product information: Style: TA702B (analog bar+digital display) Material: plastic Measuring range: 0-9999PPM Measurement object: combustible gas Measurement accuracy: 10% f.s. Voltage: 3.7V(v) Resolution: 0.1PPM Power supply: 3.7V/1000mAH Size Information: Size: 192*70*35(mm) Packing list: Color box *1 Host *1 Cloth bag *1 Data line *1 Certificate of approval *1