Model # SJT-MF1
Milk color,imported fire-proof PC material
voltage 180-240V; 
Electric current:30A 
Time-lapse standard: 8-15s
Product size: L86*W86*H50mm;  
Product Weight: 150g

It is power switch for saving electricity. It use the card to put in the slot, then the switch will make the power on

Suitable range: Mifare 1 card only.