Dust Particle Counter Multi Functional Handheld Air Particle Tester Meter♪
Working Humidity: 10%~90% RH, no frost or condensation. Storage Humidity: 0~95% RH, no frost or condensation. Battery: 3.7V lithium ion battery 2000mAh x 1 (built in). 1 x User Manual. If you do not receive our reply within 48 hours, pls.