Paradox Wireless Motion Sensor for Paradox M systems, three-axis accelerometer sensor. Temperature sensor, sensitivity level control. For indoor use, includes 1 x 3V lithium battery (CR2032), 3-year battery life, Certifications: CE, EN 50131-2-2, EN 50131-6, EN 50131-5-3, FCC 15.247, superior two-way wireless communication