Portable air purifier $ 11.80 Electrical parameters: input voltage/frequency AC220V Output voltage: -0.5--7.5KVd.c when AC220V. Negative ion concentration:5.0x 106PCS/cm310% at AC220V (test at 150mm) Insulation resistance: power cord outer box20M 2 (500V DC) Dielectric strength: power cord to the outer box AC 1800V 60HZ 5mA 3S without breakdown Rated power <1W Input current <80mA Operating temperature range 10C~+60C Operating humidity range 35%~85% Storage temperature: -20C~+70C Humidity resistance: no electricity, temperature of +25"C, relative humidity of 95% environment, placed for 72 hours No abnormal phenomenon. : High temperature characteristics: no electricity, no abnormal phenomenon after 72 hours in an environment with a temperature of +70C Low temperature characteristics: no electricity, no abnormal phenomenon after 72 hours in an environment with a temperature of -20C Drop test: 100cm away from the ground, drop freely on the board, and it can still work normally.