... % to 90% RH, non-condensingPower supplyUSB. Working voltage: +4.75V~+5.25V standard: +5VDC working current: <400mA Power: <1WCalibration9 point ESDIEC61000 ... key and left key, etc. Package inside1set touch frame, 1set M2.5 screws, 1pcs USB cable, Mini-CD driver, manualCertificatesCE, FCC, ROHS ...