1. Personalized LED display with left/right/up, windmill, diamond patterns. 2. Built-in Li-ion battery rechargeable via USB, 3.7V 650mAh, provides up to 10 hours of continuous operation. 3. Includes remote control and taillight with adjustable mounting straps for compatibility with various bike models. 4. Enhanced night visibility with laser mode to help maintain safe distance from other road users. 5. High-performance rear bike light, shockproof and waterproof, functions reliably in all weather conditions. Suitable for mountain bikes, road bikes, hybrid bikes, and more. Light power: 3.7V 650mAh USB battery Remote control battery: 1 x CR2032 (included) Color: Black Material: ABS Package Contents: 1 x Lamp 1 x Remote control 1 x USB charging cable Note: Light reflection and screen differences may cause slight variations in color. Measurement error allowed within +/- 1-3 cm.