General description The WiFi Wireless Smart Video Doorbell is a versatile door intercom and security camera designed for easy installation and reliable performance. With a long receiving distance of up to 300m in open spaces, it is suitable for various settings including office buildings, hotels, homes, and hospitals. Technical specifications Receiving Distance: Up to 300m (open space) Volume: 0-110dB, 5 levels adjustable Tone: 55 optional built-in tones Frequency: 433.92MHz ± 280KHz Transmitter Size: 35 x 85 x 15mm Receiver Size: 82 x 82 x 31mm Power Supply: Transmitter - 1 x 12V 23A battery (NOT INCLUDED); Receiver - 3 x AAA batteries (NOT INCLUDED) Transmitter: IP55 waterproof Installation Easy wall mounting with double-sided adhesive tape or screws No wiring required Do not mount the transmitter on a metal door to avoid signal weakening Keep the receiver away from electrical appliances with strong electromagnetic radiation Usage Chime range level LED indicator Open alarm for