Fingerprint Biometric Digital Lock for Office and Home SL-F8905

• Master card is the highest authority of the door lock, please keep it safe
• A mechanical key is for emergency unlock, please put it in a safe place
• Dispose of used batteries according to local environmental requirements
• Do not a mixture of old and new, or different brand batteries
• Use AA alkaline batteries or AA1.5V rechargeable lithium batteries
• Do not use water or other liquid shower door lock
• Technological innovation, Please check our website
• Final interpretation of this manual is on our company