No lock hole design, it completely abandons the traditional key and lock, in the fully opened and closed by remote control, realized the real security. Extended antenna, stronger signal, safer and more responsive.
Add USB external power source function. Make sure the lock works when battery (not included) was dead. Easy installation on all kind of doors, very convenient.
(if you need other color, please tell us, or I will send silver color). Lock size: 15.5 x 8 x 3.5cm. Controller size:6 x 3 x 1cm.1 Bag of Mounting Screws. Note: 019 no touch unclock function, 010 and 011A have this function. The link video showing is 010 model.