Product name: Headlamp Product size: 8.9x3.7cm or 3.5x1.45in Battery:600mAh Working time:1200mAh Product material: ABS Product features: 1. COB Floodlight Design: This outdoor headlamp features a COB floodlight design, providing a wide and even illumination for various outdoor activities. 2. USB Rechargeable: Conveniently rechargeable via USB, eliminating the need for disposable batteries and ensuring a sustainable power source. 3. Multi-Functional Headlamp: Versatile and multi-functional, this headlamp is suitable for a range of outdoor tasks such as hiking, camping, biking, and more. 4. Detachable and Portable: The headlamp is designed to be detachable for easy carrying and storage, making it ideal for on-the-go use. 5. Adjustable Head Strap: Equipped with an adjustable head strap, this headlamp ensures a comfortable and secure fit for different head sizes. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact me we will give you some suggestion, but it is for you reference only. Package includes: 1 pc Headlamp Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.