• COB LED technology :The product features COB LED technology, which provides a brighter and more uniform light compared to traditional LEDs. • IPX4 waterproof rating :With an IPX4 waterproof rating, this armband light is suitable for use during sports activities or outdoor events in wet conditions. • Type-C USB rechargeable :The product is Type-C USB rechargeable, making it convenient to charge using a power bank or laptop. • 500LM brightness :With a brightness of 500LM, this armband light provides ample illumination for outdoor activities like running or hiking. • Increasing visibility and safety during early morning night activities. You can be seen in the dark when running, cycling, walking dog, camping etc. The battery capacity is 400mAh, and it can be used for 3 hours in red and white constant light mode, and for 1.5 hours in flashing mode Color: A:Black Material: Plastic Package Contents: 1 x Armband Running Light 1 x USB Cable 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.