This bicycle wheel light features in colorful lighting as for visual warning with the wheel spinning in cycling. It has on/off switch, allowing more accurate control of lighting when cyclists desire to. This lamp has no sensor in response to light. When the lamp is turned on, the light works only with movement. When movement stops, the light will automatically turn off in about 48 seconds. Features: - Built with super bright 14 RBG LED SMT chips, single LED flashes 8 colors;- 30 patterns flashed in sequence, changing every four seconds;- With movement sensor & on/off switch, easier and accurate to control lighting- ABS and PC casing material, durable use, rain water proof design- Quick release and installation, without involving any tool Specifications: - Light source: 14 PCS RGB LED SMT#5050 7 LEDs each side- Mode: 30 patterns flashing in sequence, changing every 4 seconds- Switch: On/off pre button, and movement sensor.- Battery: 1*AAA (Not included)- Time: About 7 hours in consecutive use, subject to battery volume- Ingre protection: Rain water proof. Do not use in water- Material: PC and ABS, bra, electronic devices- Positioning: To be fixed on bicycle spokes- Net weight: Approx. 33g;- Packing: Retail Blister Package Includes: As per order option (Battery not included) Note: 1. This lamp is of water proof design, but do not soak this item in water for use.2. This lamp flashes 30 patterns in sequence, such patterns can NOT be fixed or selected.3. The graphic pattern at the picture is only for reference, as the visibility of full circle at wheel is subject to cycling speed (over 20KM/Hr).