SecurityMan SM-002M Door / Window Sensor White Type: Accessories Color: White Specifications: Battery Powered: DC 1.5V (1 x AA battery, last up to 1 year) LED's: Red Transmission Frequency: 433 MHz Transmission Distance: 490 feet clear line of sight (no walls) Dimensions: 0.75 x 3.00 x 2.00 Package Contents: 1 x SM-002M 1 x Manual