Features: with calling, monitoring, intercom, unlocking, hands-free, indoor two-way calling intercom. function 7-inch TFT LCD, no radiation, low power consumption, high-definition widescreen image. Hands-free intercom function. Electric unlocking function. With the function of monitoring the outside. The image brightness, chroma and volume can be adjusted. Aluminum alloy outdoor unit with and wear- treatment. Indoor unit ultra-thin design, aluminum panel, electroplated buttons, beautiful and luxurious. 12 chord sounds are optional, so you 't always hear the monotonous doorbell. The outdoor unit is exquisite and compact, with an aluminum alloy shell, night vision infrared function, and wall-mounted installation is simple and convenient. Performance parameters: 1. Switching power supply: AC220V-50Hz DC15V 1.2A 2. Whole machine current: less than 800mA 3. Call delay time: 100S10% 4. Monitoring delay time: 60S10% 5. Camera sensor: OV7430 420 lines 6. Lens: 3.6MM92 degrees 7. Outdoor unit with infrared night vision function: low opening 10LUX infrared opening 8. Indoor unit dimensions: (H)165x(W)235x(D)35mm 9. Outdoor unit dimensions: (H)125x(W)52x(D)30mm 10. Outdoor installation method: wall-mounted (The product appearance and printed words depending on the batch, but this does not affect use) Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage:AC110V Color:As shown Material:ABS Package Contents: 1set * doorbell Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.