21 Keys RF Mini Wireless Remote Dimmer Controller WC2811 2812B Full Color Adjustable Brightness Effect RF LED Dimmer Item Type: RF Mini Wireless Remote Controller Material: Plastic Weight: Approx. 26g / 0.9oz Remote Control Battery (Battery not Included): 1 x Button Battery, CR2025 Application Range: 1. Suitable for ultra thin lightboxes, illuminated signs, advertising signs, and other similar applications. 2. Ideal for indoor commercial lighting, such as upscale specialty stores and shopping malls. 3. Perfect for creating ambiance in entertainment venues, beauty salons, karaoke rooms, fashion shows, and more. 4. Creates a warm and relaxing feeling in bars, KTVs, coffee shops, and other leisure places. 5. Perfect for lighting up crafts, automotive and yacht decorations, and other similar applications. 6. Ideal for path and contour signs, illuminated signs, and other similar applications. 7. Suitable for use in shopping malls, hotels, exhibition halls, outdoor decoration, and other similar locations. 8. Provides stunning architectural and landscape lighting, as well as household and city illumination.