Model eSSL Hotel Lock HL100 eSSL Hotel Lock HL200 Power 4 x 1.5V AA alkaline batteries, 4 x 1.5V AA alkaline batteries, Battery Location Inside of the back lock Inside of the back lock Lock Body Stainless steel quality SUS304 Stainless steel quality SUS304 Metal Finishes Silver, Gold, Matte Black Silver, Gold, Matte Black Emergency Opening Options Emergency Opening with Mechanical cylinder Emergency Opening with Mechanical cylinder Locking Mechanism Electro-mechanical locking mechanism Electro-mechanical locking mechanism Door Thickness 35-80mm 35-66mm Software Compatible BIS Hotel BIS Hotel Storage Temperature Workable -200C-600C : Non-condensing environment -40C~80C,non-condensing environment Tested Operating Temperature Tested from -25C -70C Tested from :-20C~66C Supported RFID Standard 13.56Mhz Technology – ISO 14443 (MIFARE Classic) 13.56Mhz Technology – ISO 14443 (MIFARE Classic)