Home Alarm Systems descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Wireless Home Security, Window/ Door Alarm, Magnetic Sensor. Features: Specially Design for Rental Apartment, Villa, Family Security. Wireless Remote Control to Arm or Disarm. Super Loud Alarm of 105dB, Scare Thief Away. Powered by 2 Pieces of AAA Alkaline Batteries(not Included). Low Power Remind with LED Indicator. Magnetic Sensor, Door and Window sensor. Can Easily Mount to Windows or Doors with Included Double Sides Adhesive Tape, No Tools Required. Door Bell Function, Reminding People in House Open Door for You. Specifications: Alarm Size: 85 * 40 * 15mm / 3.3 * 1.6 * 0.6in Alarm Volume: 105 DB Host Battery: 2 * AAA Alkaline Battery Operation Remote Control Battery: 1*27A12V Remote Control Distance: About 30M Without Barrier Battery Life: More Than 1 Year Working Temperature: -10 ~ 60 °C Working Humidity: <80% Storage Temperature: -20 °C ~ 70 °C Alarm Host Weight: 30g / 1.0oz Magnet Weight: 7g / 0.2oz Magnet Size: 46 * 10 * 11mm / 1.8 * 0.4 * 0.4in . Products number : SOMONO95813