Feature: 1. Adjustable strap, which can not only fit different figures, but also can firmly fix the light on your body through a stable triangular structure. 2. Three lighting modes for you to choose, including high/medium/flashing light mode, which can meet your different needs. 3. USB charging, built‑in 2000MAH rechargeable lithium battery, continuous output, easy to use, can be connected to power bank, laptop, mobile phone charging head. 4. Adopting high‑quality acrylic + IPX65 waterproof design, it is safe to use outdoors, dustproof and rainproof, heat‑resistant and corrosion‑resistant, and has a long service life. 5. Wide range of applications, suitable for night running, camping, hiking, jogging, walking, fishing, cycling, mountaineering, adventure, etc. Specification: Item Type: Night Running Light Material: Acrylic Color: As shown in the picture Front Lamp Size: Approx. 4.8x4.8cm / 1.9x1.9in Back Lamp Size: Approx. 10x5.5cm / 3.9x2.2in Weight: Approx.205g/7.2oz Application: Chest running light Battery: 1 x 18650 rechargeable lithium battery, 2000MAH(Included) Light Color: 3 white lights + 8 red lights Charging Time: 2-3 hours Use Time: 2-5 hours Waterproof Rating: IPX65 . Package List: 1 x Night Running Light1 x USB Cable1 x Instruction Manual Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.