EPOSGEAR Minder Ultra Slim Window Glass Vibration Security Burglar Alarm for Homes, Cars, Sheds, Caravans, RV, Motorhomes etc (1, With Extra Batteries) Slim, sleek and attractive design. Just attach it to the window to protect the property from unauthorised entry. Attach the vibration alarm to the window by removing the film covering the adhesive warning sticker on the rear of the unit. Swith the unit 'ON' to arm and 3 short beeps will be heard. Once armed, if anyone attempts false entry a 120dB siren will sound for approx. 25 seconds. To disarm switch to 'OFF' position. Supplied with batteries. Please test occasionally and replace once a year. Perfect for: - Home - Office - Sheds - Garages - Motorhomes - Boats - Vehicles - Outbuildings