Product weight: 28.8g Battery not included Product Name: Bicycle flower drum lamp I. specifications 1. Note: this material is suitable for models with flower drum diameter no more than 35mm. 2. Material: PC 3. It is composed of a circular ring of 8 LED lights. 4. There are three flashing modes, slow flashing, fast flashing and constant flashing, which are controlled and switched by the switch on the edge of the product. 5. With three LR44 batteries, it can work continuously for 12 hours. 6. It can't resist stealth design. Install and dismantle it quickly. After the product is loaded, it is gorgeous and elegant no matter when it is parked by bicycle. As a safety flash lamp, it is also suitable for the installation of children's cars. II. Installation method: 1. According to the size of the hub, select a suitable rubber pad to paste on the inner ring of the product. 2. Place the product in the center of the hub and tighten the screws.