Smart Wireless WiFi Video Doorbell Door Intercom Security Camera

With good penetration and a long reception range of up to 300 m (in open field).Easy installation, no wiring required.Simple wall mounting with double-sided adhesive tape or screws.55 optional built-in tones and 5 adjustable volume levels from 0 to 110 dB. The transmitter is IP55 waterproof.Perfect for office buildings, hotels, private homes, hospitals, etc.LED indicator for ring zone level. Incoming door open alarm for shop/office/home/business. Easy installation, no wiring required. Simple wall mounting with double-sided adhesive tape or screws. 55 optional built-in tones and 5 adjustable volume levels from 0 to 110 dB. The transmitter is waterproof according to IP55. Perfect for office buildings, hotels, apartments, hospitals, etc. Specifications: Reception range: Up to 300 m (open space) Volume: 0-110 dB, 5 adjustable levels Tone: 55 tones Frequency: 433.92 MHz ± 280 kHz Power supply: - Transmitter: 1 x 12 V 23 A battery (NOT INCLUDED) - Receiver: 3 x AAA batteries (NOT INCLUDED) Transmitter size: 35 x 85 x 15 mm Transmitter size: Receiver: 82 x 82 x 31 mm NOTE: 1. Do not mount this transmitter on a metal door, as this will reduce the signal range. 2. The receiver should be placed as far away as possible from electrical devices that emit strong electromagnetic radiation. 3. The actual signal reception range will be affected by the usage environment (TV, computer, stereo, etc.). Package contents: 1 x Transmitter 1 x Receiver 1 x Pack of mounting accessories 1 x User manual