Knog Plugger Front Twinpack is a set of front and rear lights. The Plugger is the perfect choice for any cyclist looking for a bright, easy-to-attach front light with excellent visibility from different angles. The model is made of silicone and is suitable for all types of cycling, from commuting to road events. The second lamp is the Plug, which features side vents for improved visibility from the side. Battery life in eco-flash mode is over 190 hours. Two different lengths of silicone rubber bands are included for attachment to different handlebars. LIGHT FONT Weight 85 g Light output 350 Lumens Battery capacity 1050 mAh Battery life in max. state. 1.5 - 2 hours. BACKLIGHT Weight 30 g Luminous output 10 Lumens Battery capacity 220 mAh Battery life at max. output. 1.2 - 2 hours.LIGHTING MODES: 5 modes; Max, Medium, Medium with discharge, Flicker, Eco-Flicker FIT: small and medium interchangeable elastic (larger for tail light) for different frame shapes and diameters. BATTERY: Lithium Polymer rechargeable via USB. Lasts up to 190+ hours in eco flash mode. 100% WATERPROOF: Plugger is 100% waterproof and all-weather resistant. LED: A powerful LED providing a powerful beam of light. Frontlight battery lifeMAX 1.5 Hrs MEDIUM 3.75 Hrs PULSE 4.7 Hrs FLASH 12.25 Hrs ECO FLASH 190+ Hrs .