Working temperature: -10 to 55 Celsius degree (14 to 131 Fahrenheit degree). Good quality and durable to use. Aluminum shell adopts high strength material, with hard anodised processing. Anodized aluminum, lock body and suction plate selected chemical electroplating antirust treatment.Use magnetic power to lock the door. Built-in reverse current protection device (MOV). There have 1 receiver, 1 switch panel and 2 remote controllers, install the receiver and the lock can be opened by switch panel, also can be. Opened by remote controller when you far away from the lock. Fit for wooden door, metal door, glass door, fireproof door, etc. 1 x Electronic magnetic lock. 1 x 12V 5A Power supply. 1 x Bag of installation kit. L send the items within. E highly recommend the non-USA buyers choose. We will do our best to solve any problems and provide you with the best customer services. We do our best to serve our customers the best that we can.