Brand Name:Realhelp Model Number:E6-Button Item Type:Exit Button Size:86mm*86mm*5mm Dimensions:86x 86x 25 (mm) Standard Structure:Fireproof material mixed resin Electrical Performance:3A @ 36VDC Contact:NO /COM Installation:surface mounted Temperature:-10 ~ 55C(14-131F) Suitable Humidity:0 ~ 95% (relative humidity)