K 729 is the world's smallest 30LUX German bike light, weighing less than 70g, which is the lightest of the same type of product. The bike light uses high-power white CREE LED, which is bright and has a long illumination distance. It is equipped with 4 operation modes, which can be used according to different road conditions. The bike light uses O'FIT lamp holder, which is easy to install and has a anti-drop protection.
This manual describes the Roxim bike light, its four illumination modes, battery requirements, and performance specifications. It also explains how to mount the light on handlebars with a 22 mm–35 mm tube diameter using the O'FIT mounting system.
Installation is tool‑free: pull, click, and lock the light in place, after which an automatic drop‑protection feature engages. The document lists the light’s dimensions, weight, and runtime for each mode, and points to the company website for additional technical details. This manual is written in Chinese.
| Dimensions | 46 mm × 36 mm × 110 mm |
|---|---|
| Weight (without batteries) | 68 g |
| Total weight (with batteries) | 128 g |
| Mount weight | 20 g |
| Brightness – Aurora mode | 30 LUX |
| Brightness – Strong mode | 23 LUX |
| Brightness – Economy mode | 12 LUX |
| Battery specification | SANYO 2700 mAh Ni‑MH HR‑3U |
| Compatible handlebar tube diameter | 22 mm – 35 mm |
| Included accessory | MB‑10 O'FIT mounting bracket |
It provides four modes: Aurora (30 LUX), Strong (23 LUX), Economy (12 LUX), and a low‑power mode.
Run times are approximately 2 h for Aurora, 3 h for Strong, 6.5 h for Economy, and up to 50 h in low‑power mode.