Features 1、High reliability sensor to help you detect the abnormal things and start vibrating in time. 2、Made of plastic materials, safe and stable. It's durable for long time use. 3、Its alarm time can continue up to 40 seconds and you will not miss something necessary. 4、Safe alarm volume. The alarm volume is less than 120DB and it will not harm your ears. 5、Long control range. The distance of remote control can be up to 20m Specification Features: 1. High reliability sensor to help you detect the abnormal things and start vibrating in time. 2. Made of plastic materials, safe and stable. It's durable for long time use. 3. Its alarm time can continue up to 40 seconds and you will not miss something necessary. 4. Safe alarm volume. The alarm volume is less than 120DB and it will not harm your ears. 5. Long control range. The distance of remote control can be up to 20m Specification: Condition: 100% Brand New Shell Material: Plastic Color: Black Alarm Mode: Trigger Full Micro Vibration Control Mode: Remote Wireless Control Alarm Volume: ≤120DB Duration of Each Alarm: ≤40s Control Range: Up to 20m Power: Alarm DC 9V Battery (not included), Remote Control GF 22Battery (not included) Wall Hole Diameter: Approx. 7mm / 0.3in Weight: Approx. 91g / 3.2oz Alarm Size: Approx. 90 * 55 * 25mm / 3.5 * 2.2 * 1.0in Remote Control Size: Approx. 50 * 40 * 13mm / 2.0 * 1.6 * 0.5in Package List: 1 * Alarm 1 * Remote Control Note: 1. Please make sure that the 9V battery is inserted into the item in the correct position (don't reverse the cathode and anode) 2. Pushing 'ON' button to turn on the alarm and you may hear a beep sound, then press 'LOCK' button and you may hear a beep sound again. About 10-15 seconds later, the alarm turn into the state of alert. 3. At the state of alert, the item may alarm while it is shocked or moved, the alarm sound will last for 30 seconds, or you may push button 'unlock' to turn it off. 4. The vibration frequency is set while it is made, the level of sensitivity is stationary, therefore please don't consider the sensitive issue to be a quality problem.