Features: Opening size: 16mm / 13mm / 10mm, input voltage: 3.7–24V, maximum load current: 3A. This LED dimmer switch is designed for recessed installation to save space. It connects easily to LED lighting. Operation is simple: tap once to turn on, tap again to turn off, and press and hold to adjust brightness smoothly from 0% to 100%. Suitable for use in cabinets, wine coolers, display cabinets, closets, and similar applications. Compatible with 12V LED lighting including table lamps, ceiling lights, pendant lights, and other low-voltage LED fixtures. Requires a constant voltage driver—do not use with constant current drivers. Specifications: Material: Plastic Color: Black / White Opening size: 16mm (0.63 inch) / 13mm (0.51 inch) / 10mm (0.39 inch) Input voltage: 3.7–24V Maximum load current: 3A Package includes: 1 x Touch dimmer switch Note: Slight measurement variations of up to 1–2 cm may occur due to manual measurement. Colors may vary slightly depending on monitor settings.