4 * 9000 mAh ER26500 Li-SOCl2 Replaceable Batteries Battery Life: Around 1.6 Years (30-min Interval, 25°C, 1000 People per Day) A Built-in Temperature Sensor Support Environmental and Device Operating Temperature Detection 100% Anonymity and GDPR-compliant Support U-Turn Filtering, Bi-directional People Counting, Side by Side Differentiation Advanced Features: Milesight D2D Controller NFC Enabled IP30 Rated Technology: Radar (Battery Version Only) & Thermopile Installation Height: 2.5 m ~ 3.0 m Detection Range: 5.55 m x 2.30 m @ 3 m Installation Height Sensor Adjustable Angle: 0°~90° Best Operating Temperature: 15 °C ~ 30 °C Detection Rate: Up to 95% (Single Person: Up to 99%)