Main Features: -Long Battery Life: 4 hours of charging, up to 13H of discharge.  -Two Gear of Dimming: reading mode brightness 100%, leisure mode brightness 50%. The two-speed mode can be adjusted automatically according to the actual situation.  -Multiple Charging Modes: the charging connector is a USB connector, whether it is a conventional socket adapter or a power bank, it can charge the lamp at any time to meet the lighting needs.  -Comfortable Neck Hanging Design: 10cm length design, net weight 110g light and comfortable.    Specification: Color:Black;  Material:Battery Box (Flame Retardant ABS), Lamp Holder (ABS), Lamp (Silicone Hose);  Color Tmperature:4000K;  Dimming Mode:2gear;  Luminous Flux:36LM;  Lighting Power:0.5W x 2;    Battery Information: Battery Type:Li-ion battery;  Battery Capacity:1000mAh;    Dimension: Product Weight:0.11kg;  Package Weight:0.3kg;  Product Size (L x W x H):60.00 x 3.00 x 2.60 cm;    Package Contents: 1 x Lamp;  1 x Manual