This remote pressure switch is designed for the WF-501B flashlight. It enables remote on/off control of the flashlight. Function: Remote Pressure Switch Compatible with: WF-501B LED Flashlight Also compatible with flashlights featuring the same metal case design. Dimensions: 3 cm x 2 cm x 2 cm (1.18 in x 0.78 in x 0.78 in) Remote switch diameter: 23.5 mm Materials: Aluminum and plastic Color: Black Please verify compatibility with your flashlight before purchase, as variations may exist across different production batches. Package includes: 1 x Remote pressure switch for WF-501B Other accessories are not included. Note: Screen settings and lighting conditions may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.