Aiphone Wireless Doorphone Intercom with No Wiring Base Unit and Handset Set WL-11 Battery-Powered Handset, Required,

Wireless base unit with monitor (WL-1ME): Power supply: Dedicated nickel-metal hydride battery (model number WLW-BT), DC 2.4V (2000mAh). Ring tone: Choose from 4 melodies and 4 tones. Call method: Automatic loudspeaker alternating call/Press-to-talk call. Wireless communication method: 1.9GHz TDMA-WB (Time Division Multiple Access). Operating time*1: Standby time: Approx. 18 hours. Total talk time: Approx. 4 hours. Charging time: Approx. 16 hours. Usable distance: Approx. 100m/Line of sight (between base unit and entrance handset). Display: 2.4-inch TFT color LCD. Ambient operating temperature: 0-40°C. Material (case): Self-extinguishing resin. Color: White. Dimensions (mm): 57(W) x 150(H) x 27(D). Weight: Approx. 170g (including battery pack). It has a built-in function that automatically records visitors while you are away (still images: 100, maximum number of protected visitors: 20). Even if you are not at home, if a visitor has been recorded, the blue indicator light will flash when you return home to let you know that there has been a visitor. The wide-angle camera allows you to switch the image of your front door to a wide screen (approximately 110° horizontal angle of view). The wide screen can be divided into nine parts, and each part can be viewed on the normal screen (you can check the periphery of the image). The line-of-sight distance between the front door unit and the wireless base unit with monitor is approximately 100m. *Because it is wireless, the displayed image will be updated every 1-2 seconds. Wireless Entrance Unit (Model: WL-DA): Power Supply: 6 AA batteries (recommended: nickel-metal hydride batteries with a capacity of 2500mAh or more) *2 Battery Life: Approximately 2 years *3 Image Sensor: CMOS (solid-state image sensor) Image Range: Approximately 50cm (vertical) x 45cm (horizontal) at 50cm in front of the camera. *The image range is a guideline and may vary depending on the installation environment. Minimum Illumination: Approximately 5 lux at 50cm in front of the camera. Ambient Operating Temperature: -10 to +50°C (14 to 122°F). Material: Self-extinguishing resin. Color: Silver. Dimensions (W x H x D): 100mm x 130mm x 42mm. Weight: Approximately 220g. Note: Dustproof and splashproof (equivalent to JIS C 0920 IP54). The doorbell unit is battery-powered, eliminating the need for wiring and simplifying installation. The long battery life of up to 24 months reduces the need for replacement. (Conditions: ambient temperature 20°C, three times a day, nickel-metal hydride battery with a capacity of 2500mAh or more, no manual doorbell monitoring function.) When the battery is low, a message will appear on the menu screen and the indicator light will flash red to notify you. "Monitor function" that allows you to check the situation at the entrance from inside the room Manufacturer's warranty period: 2 years