describe:-Electric accessories-General-Wireless PIR motion detector Remote motion alarm detector Doorbell alarmWireless PIR motion detector alarm detector remote doorbell alarm motion alarm features:A motion detector is a device that detects physical movement on a device or in a real-time environment, including a transmitter and a receiver. If the transmitter detects movement, the receiver will emit an audible and visual alarm. Very suitable for families, apartments, commercial places, shops, offices, garages, mailboxes...The wireless range from the sensor to the outdoor receiver is as high as 918 feet, which is enough for you to place/install the receiver. The detection range of the sensor can reach 26 feet in the open air. Welcome / doorbell / alarm clock / colorful lights / night light mode 5 in 1 multi-function, you can set the appropriate mode according to your needs25-110dB volume adjustment -. Provides 4 adjustable volume levels (from 25dB to 110dB) motion alarm receiver. You can easily set the appropriate volume according to your needs36 MELODIES & 4 COLORS LED FLASH -. 36 different ringtones for your choice. With 4 kinds of LED light colors, Color/Red/Blue/Green and 4-level brightness adjustable, multiple inputs can be distinguished only by different light colors.Easy to install and self-adhesive warranty wall/installation, no wiring required. Easy to use, battery/power supply. What you need for DIY pairingPower supply (receiver). Micro USB or AAA alkaline batteries x 3 (not included)Power supply (PIR transmitter): Micro USB battery or AA alkaline battery x 3 (not included)Battery life: 5-7 months (after 30 minutes per day)Wireless range: 280m / 918ftMotion detection range: 2-8m / 6.6-26ftRinging volume: 113dB workFrequency: 433.