"Charge for 1.5 hours, use for 1.5 years"

STIIL Smart Biometric Fingerprint Lock The ultimate gym lock solution  *Due to high demand shipping might take up to 3 weeks World's longest working time, you'll only need to charge it once every 18 months Fast charging, it takes 1.5 hours for full charge One month (30 days) before the battery is empty, the red LED light will turn on and start blinking for 30 days Up to 10 different fingers FastKnow technology - unlocks in less than half a second Weather proof (rain, snow, heat, cold) - we've tested it in the hot weather in Qatar and under the heaviest storms in Chicago.