General description This Smart Wireless WiFi Video Doorbell Door Intercom Security Camera is designed for easy installation and reliable performance. With a long reception range of up to 300 meters in open fields, it is suitable for various settings including office buildings, hotels, private homes, and hospitals. The device features a waterproof transmitter rated IP55, ensuring durability in different weather conditions. Technical specifications Reception range: Up to 300 m (open space) Volume: 0-110 dB, 5 adjustable levels Tone: 55 optional built-in tones Frequency: 433.92 MHz ± 280 kHz Transmitter size: 35 x 85 x 15 mm Receiver size: 82 x 82 x 31 mm Power supply: Transmitter: 1 x 12 V 23 A battery (NOT INCLUDED); Receiver: 3 x AAA batteries (NOT INCLUDED) Installation Easy installation with no wiring required Simple wall mounting using double-sided adhesive tape or screws Do not mount the transmitter on a metal door to avoid reduced signal range Place the receiver away from