Audible and visual alarm: A powerful 105dB alarm sound and bright lights can effectively scare away thieves and intruders. Magnetic induction alarm: Sensitive, low false alarm rate. Multifunctional security alarm: With arming, disarming, emergency alarm, and doorbell functions, it largely meets your needs. Simple operation: Use the remote control; it is very easy to operate. Flexible options: If you need additional remote controls for family members or simply to replace them. Specifications: Model: M701, 1 alarm and 2 remote controls Alarm volume: 105dB Frequency: 433MHz Operating environment temperature: -10 ~60°C Operating Environment Humidity: 80% Storage Temperature: -20°C - +70°C Host Battery: 2 * AAA batteries (Not included) Remote Control Battery: 12V 27A alkaline battery (Included) Item Size: 8.8 * 4 * 1.7cm / 3.5 * 1.6 * 0.7in Item Weight: Approx. 62g Packaging Information: Package Size: Approx. 18 * 11 * 1.5cm / 7.1 * 4.3 * 0.6in Package weight: approx. 90g / 3.2oz Package