And these series is designed for easy using which the user just need to put in 3 sets AAA battery in the backside of door lock box and download our app
Contact: Information Center
Phone: +8615813805304
Tel: whatSapp/Wechat
Email: infors@sintronictech.com
Add: 201,Plaza A,Qianwan 1st Rd,Nanshan,Shenzhen City,Guangdong Province,China