1,Light Alert:The LED light blinks once when the remote control button is pressed, and keeps blinking when the alarm is triggered. 2,anti-theft mode:Open the door immediately sound and light alarm for even if the door is closed in advance, the alarm will sound for . 3,Welcome Mode: Door Magnetic "Ding " when opening the door 4,SOS mode: encounter danger manual alarm press emergency key (S0S) sound and light alarm DDT model: theft prevention of valuables Alarm mode: open door alarm, close door stop alarm Colour:White Material:ABS Size: Siren: 9 x 4.3 x 1.3cm; Magnetic Stripe: 4.5 x 3.3 x 1.3cm; Remote: 6 x 3.3 x 1cm Package Contents: 1 x siren 1 x magnetic strip 2 x remote control 1 x sticker 2 x AAA batteries Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. window alarm door open alarm door sensor alarm