Product Details 1. Use high transparency optical light guide strips, with a maximum lumen value of up to 120 lumens 2.8 lighting modes: low/medium/high/flash/breathing/comet inside and outside alternation/intelligent light sensing 3. Built in acceleration sensor, automatically warning when sensing deceleration in any mode (can be manually turned off) 4. No tool disassembly required, compatible with 22-35mm seat tube installation and supports installation under the seat cushion 5. IPX6 waterproof, fearless of wind and rain challenges 6. USB charging is convenient and fast 7. RN120 uses a highly transparent optical aperture to even output of the light source and reduce light loss, with a maximum brightness of 120 lumens 8. Regardless of black or daylight, RN120 is visible within a distance of 1.500m, providing protection When cycling and to , the taillights automatically light up and last for 3 seconds, conveying the deceleration information to the rear and increasing warning 10. When the remaining battery capacity of RN120 is less than 5%, the taillights automatically enter safe mode, and the taillights lock and flash normally to extend the battery life 11. The RN120 shell adopts a semi transparent frosted design, and the light source shoots out from both sides of the shell during operation, achieving a wide range warning of 260 ° Color: Black Material: ABS Package Contents: RN120 x1 Silicone strap x1 Seat cushion base x1 Cable tie x1 USB charging cable x1 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.