Features: Compatible with all gate openers (including swing and slide).Egg shape design, which helps to deflect rain and snow.It also fits for garage doors, alert systems and alarms. Specification: Color: Black Weight: 100g Technology: Active infrared beam Receiving range: 15000mm (it may reduce by 30% in bad weather) Frequency: 1.92KHz Input power: DC/AC 24V Wave length: 940mm Input current: R-15mA; T-30mA Operating temperature: -25 to +55 Relay output: 1A max 36V Dimension: 49.2 x 75.3 x 29.6mm/2 x 3 x 1 Package Included: 2 x photocells