Wireless Remote Control Magnetic Sensor Door Window Home Security Alarm Model: KS-SFO3R Material: Main unit features durable ABS shell. Remote control has a metal-finish design. Color: Main unit is white; remote control is black. Batteries: Main unit requires 2 AAA batteries (not included). Remote control includes 1 x 27A battery. Battery standby life: Over 12 months. Frequency: 433.92 MHz Installation gap distance (between main unit and magnet): <1 cm Magnet detection distance: >1 cm Remote control operating distance: 30–60 m Alarm volume: 108 dB (measured at 30 cm) Operating temperature: –10°C to +60°C Operating humidity: <80% RH Storage temperature: –20°C to +70°C Package Includes: 1 x Main unit (batteries not included) 1 x Remote control 1 x Instruction manual Note: 1. Slight measurement variation of 1–3 mm may occur. 2. Weight variation of 1–3 grams may occur. 3. Actual product color may vary slightly due to lighting and screen settings.