Feature: 1. EYE PROTECTION: Our reading light uses 5500K colour temperature white light, no screen flicker, 3 levels of brightness adjustment to take care of your eyes. 2. BUILT IN BATTERY: Our reading light has a built in 450mAh lithium polymer battery that lasts 3 to 4 hours on a full charge. 3. SMALL AREA LIGHTING: This reading light from us illuminates the smallest areas with a light bright enough to illuminate them without disturbing your sleeping partner at night. 4. LIGHTWEIGHT: The neck light is ergonomically designed to free your hands and ensure the safety of your eyes, extremely convenient and practical, enjoy reading and jogging at night. 5. COMFORTABLE TO WEAR: The ultra soft silicone maximises wearing comfort and swivels powerfully 360° for easy selection of the best angle. Specification: Item Type: Neck Reading LED Lamp Material: Silicone, ABS Size: Single arm length Approx. 31cm / 12.2in Internal Battery: Li polymer 450mAh (included) Light Source: White light Brightness Levels: 3 levels of low, medium and high brightness Working Time: 3-4H (determined by brightness) Charging Method: USB micro 5V Weight: Approx. 128g / 4.5oz. Package List: 1 x Neck Reading LED Lamp1 x Instruction1 x USB Cable