Item NO.:  M029
Material:    ABS
Size:         dia=50mm
Color:        black
Power supply: 3pcs AAA batteries
Battery life:  10-12 month.
Low voltage alarm function: voltage lower than 4.8V
External power interface: yes
Working temperature:   -20 ℃ ~ +65 ℃ 
Working humidity: less than 98%RH
Lock body material:fire rated plastic.

small size and sleek design.
two working modes in one lock suitable for both public and private lockers.
(terporary code mode=public mode ,permanent code mode=private mode)