Name: Smart Door Lock A3 Model number: HLS-A3 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) Operating voltage range: 4.0-6.0V Emergency power Equipped with emergency power interface, voltage ranges from 6V to 9V Quiescent current: < 50 UA Communicate signal with hosts: encrypted 433MHz Operating temperature: -25° to 55° C Relative humidity: < 93% noncondensing