Name: Smart Door Lock A3S Model number: HLS-A3S Size: 360.9 mm(L) * 74.9 mm(W) * 78.9 mm(H) Applicable door type: Wooden door, copper door, metal door, stainless steel door Key capacity: Card or password 1000 pieces, fingerprint 200 piece Power supply: DC6V (4pcs 5#battery), the battery power can support door lock open/close for 8000 times. Operating voltage range: 4.0-6.0V Emergency power Equipped with emergency power interface, voltage 9V Quiescent current: < 50 UA Communicate signal with hosts: encrypted 433MHz Operating temperature: -25° to 55° C Relative humidity: < 95% noncondensing Communicate with host: Encrypted 433 MHz