General description Remote pressure switch is specially designed for the -501B flashlight, allowing you to control your lighting with ease. Technical specifications Function: Remote Pressure Switch Compatibility Models: -501B LED Flashlight Size: 3cm x 2cm x 2cm (1.18inch x 0.78inch x 0.78inch) Remote Pressure Switch Diameter: 23.5mm Material: Aluminum, Plastic Color: Black Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with flashlights that have the same metal housing Package includes: 4 x Remote Pressure Switch for 501B