Product Description: Specifications: Can suit both Left and Right hand door (by rotating the lock 180 Degree) NO (open when powered) Fail Secure Operating Mode Can work with all the video intercom system in my store High-quality stainless steel High anti-theft and high safety Double lock heads inside and outside With electronic-control unlocking unit and a spring adjusting balance unit Easy to install User friendly Support manual unlocking, 3 keys included Suitable for : home, offices, schools, hotels, factories, warehouses, etc Technical Information: Voltage : DV 9 ~ 12V, 1.5A Power : > 12W Operating Mode: NO (open when powered) Dimensions (strike): - Approx. 36 (W) x 102 (H) x 51 (D) mm - Approx. 1-3/8" (W) x 4" (H) x 2" (D) inch Dimensions (main body): - Approx. 123 (W) x 105 (H) x 35 (D) mm - Approx. 4-3/4" (W) x 4-1/8" (H) x 1-3/8" (D) inch Package includes: Electric lock x 1 Key cylinder x 1 Key x 3 Installation Accessories (screws) x 1