SDO-501 : Track set 
SDO-501A : Track set , 433MHz remote control included  
SDO-501C : Track set, 2.4G automatic door open tag
SDO-502 : Push arm set
SDO-502A : Push arm set,  433MHz remote control included  
SDO-502C : Push arm set, 2.4G

automatic door open tagBuilt-in Bluetooth, advanced fine-turning settings using APP interface.
One key to start automatic learning positioning. Easy to install without complicated setting procedures.
Two types of force arm to select to solve the gap between the door frame and the door leaf within 30cm.
Provide automatic self-closing function, without touching the doorknob for accessing move conveniently.
It is available to install on door frame or door leaf. Move flexibility of  installation for more complicated.
Optional 2.4G automatic door access control transmitter or 315/433 MHz controller available to purchase to provide  long distant door open function. 
Centered double-sided output shaft available to select output position according to the environment. Optional door loop to protect external circuit available to purchase.
Chute lever arm using balls shaft to reduce noise and extend its service life. Patented roller design to allow larger installation error or flatness of door leaf and door frame.