1、The outdoor unit has a rain proof cover and a touch key. Moisture-proof and waterproof, and the design is more perfect. 2、Indoor display screen adopts high-strength toughened glass, high-grade luxury, and wear-resistant and scratch-proof, durable. 3、Support remote control of electric locks and adopt hands-free calls and talkback. 4、Has a disassembly‑proof alarm function, when the outdoor unit leaves the rainproof cover, the indoor unit and the outdoor unit will emit a rapid alarm.Give you the best safety performance. 5、The product adopts the most popular touch button,high sensitivity and advanced technology,which prolongs the life of the button. This doorbell is applied to replace the previous wired doorbell, or invisual doorbell, which greatly enhances home security performance. Outdoor unit can be installed beside the door, indoor unit can be freely used in the stable signal intensity place. Indoor unit can be hung on the wall closet, etc or be placed above the desk, tea table, table etc. Easy to use and easy to complete the visible interphone. Connecting wired unlock  to the electric lock is simple, saving- electricity lock module embedded intelligent lock or remote control lock. Features: HD 7"color digital display screen and 150 degree visual angle, providing a high quality view and helping you monitor the condition outside the door. Indoor display screen adopts high-strength toughened glass, high-grade luxury, and wear-resistant and scratch-proof, durable. With infrared night vision function, it can monitor and capture images in low illumination environment. Support remote control of electric locks and adopt hands-free calls and talkback. Built in 36 chord ringtones in the indoor monitor, you can choose the ringtone and adjust the volume.And there are date and time display on the indoor monitor. The outdoor unit has a rain proof cover and a touch key. Moisture-proof and waterproof, and the design is more perfect. Has a disassembly-proof alarm function, when the outdoor unit leaves the rainproof cover, the indoor unit and the outdoor unit will emit a rapid alarm.Give you the best safety performance. The product adopts the most popular touch button,high sensitivity and advanced technology,which prolongs the life of the button. It can support two outdoor units and 4 indoor units at most. Can be unlocked by password and fingerprint and support access controland unlocking indoor screen. Save 200 groups of fingerprints, which can be deleted or increased on the keyboard. Specifications: Outdoor unit Night vision: IR night. visible within 5m. Vision angle: 150° Wide Angle Resolution: ＞420 Tv line Working temperature: 15°~+55° Installation: Wall mounted Size(L * W * H): 13.1 * 9.4 * 6.0cm/ 5.2 * 3.7 * 2.4in Net weight: 0.26kg Standby time: 2 months Battery: BL-5J 1320mAh (Not included) Indoor unit Screen: 7" wide angle TFT LCD, 16:9 Display Power input: AC100V-240V 50Hz-60Hz Resolution: 800*RGB*480 Power output: DC 5V/1A Standby time: 7 days Size(L * W * H): 22.6 * 13.5 * 2.3cm/9.0 * 5.3 * 0.9in Net weight: 0.48kg Working temperature: -40°C~+70°C Battery: BL-5J 1320mAh (Not included) Package Weight: 1093g/38.6oz Package List: 1 * Outdoor Camera 1 * 7" Indoor Monitor 1 * User Manual 1 * Charger Adapter 1 * Cable 1 * 2-wired Electronic Lock 2 * 6-wired Electronic Locks 1 * Screw Installation Kit Notes: 1. Please allow a slight error due to munual measurment.Thank you for your understanding. 2. Only install and use the product after the test is successful.