Features the door will lock while supplied with power, and unlock without power. It is made from durable and high aluminum alloy material, durable for use. Special circuit design, the door will unlock until the power is cut off. With no external interference, making it more stable and safer. Timer settings for 3-6-9 seconds signal output: door status output, no/nc/com start current: 950ma standby current: 80maFeatures the door will lock while supplied with power, and unlock without power. It is made from durable and high aluminum alloy material, durable for use. Special circuit design, the door will unlock until the power is cut off. With no external interference, making it more stable and safer. Timer settings for 3-6-9 seconds signal output: door status output, no/nc/com start current: 950ma standby current: 80maFeatures the door will lock while supplied with power, and unlock without power. It is made from durable and high aluminum alloy material, durable for use. Special circuit design, the door will unlock until the power is cut off. With no external interference, making it more stable and safer. Timer settings for 3-6-9 seconds signal output: door status output, no/nc/com start current: 950ma standby current: 80maFeatures the door will lock while supplied with power, and unlock without power. It is made from durable and high aluminum alloy material, durable for use. Special circuit design, the door will unlock until the power is cut off. With no external interference, making it more stable and safer. Timer settings for 3-6-9 seconds signal output: door status output, no/nc/com start current: 950ma standby current: 80maFeatures the door will lock while supplied with power, and unlock without power. It is made from durable and high aluminum alloy material, durable for use. Special circuit design, the door will unlock until the power is cut off. With no external interference, making it more stable and safer. Timer settings for 3-6-9 seconds signal output: door status output, no/nc/com start current: 950ma standby current: 80maFeatures the door will lock while supplied with power, and unlock without power. It is made from durable and high aluminum alloy material, durable for use. Special circuit design, the door will unlock until the power is cut off. With no external interference, making it more stable and safer. Timer settings for 3-6-9 seconds signal output: door status output, no/nc/com start current: 950ma standby current: 80ma