Scope of Application-- No wires needed, it is a complete, self contained alarm system, which not only perfect for home security, but also for shops, hotels, offices, garage and factories. Wireless Motion Sensor-- PIR motion detector has a intelligent detection with a range of 6m-8m, it can emit a flash and a alarm up to 100dB when it detects motion. You can operate it with the remote control and the remote distance is up to 8m. Three Modes Options-- Welcome mode/ alarm mode/ smart mode to sufficiently meet your demand. It will emit the sound you set once it detects motion. Excellent Design-- There are 24 scene voice and 4 volume levels to be chosen, including 7 national languageU.K,China,Japan,South KoreaThailand, Malaysia, Arabia Easy to Install-- This Indoor motion sensor alarm can be stick to everywhere in your home. It come with 1 sensor alarm and 1 remote control and is powered by 3 AAA batteries (not included) or USB cable (not included), just take it with you at any time for use