Wireless Visual Intercom Doorbell. 4.3-inch IPS screen 2.4 wireless visual intercom doorbell provides a clear images. Night Vision with 940nm IR Leds, black and white image, you can still see clearly at night with low-light environment. 2-Way Intercom. Built in microphone and speaker, it supports 2-Way audio communication. Outdoor doorbell rechargeable battery 800mah (battery low consumption) and indoor monitor rechargeable battery 400mah (connect power supply for long-time working) Extra storage supports max up to 128G, for Video recording and saving. Colour:black Material:plastics With external antenna, the signal be longer than ordinary models. 13 Multi-Languages: English, Chinese, Japanese, Korean, Russian, Arabic, Vietnamese, Spanish, Portuguese, Polish, German, French, Italian. Display Screen: 4.3 inch Power Supply: Type-C, DC5V/1A Audio Information: Built-in speaker, microphone Working Humidity: 10% -80% SD Card: Supports up to 128GB (FAT32) Wireless Mode: 2.4Ghz frequency Visual Angle: 120 degrees Night Vision Type: infrared night vision Working Temperature: -10 -60 Signal Distance: Open area 150 meters. If with too many thick or metal wall/door, the distance be shorter. Battery Capacity: Rechargeable 800mah and 400mah. (the farther the distance, the more severe the power consumption) The monitor can be connected to an external power source for long-term use. Outdoor doorbell dimension: 10.9x4.25x1.8cm Indoor monitor dimension: 16.1x11.8x6.5 cm Package Contents: 1 * Video Doorbell 1 * Doorbell Camera 1 * USB Cable 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.