Rechargeable parking light and automatic brake A lightweight automatic rear brake that recharges quickly and includes an accelerometer! The Burner Brake alerts other road users in the event of emergency braking... 200 lumens in your sights, unless you've got Gilbert in your 4 x 4 behind you, you'll be clearly visible. So if you're worried about taking your bike out in less-than-optimal conditions, you've got no excuse! The different modes let you play with the situation, and make your outings safer! 5 lighting modes are available: Flash Day - 3h runtime Chase - 12h runtime Hadron - 17h runtime Bright Steady - 3h runtime Medium Steady - 7h runtime Specifications: Weight: 55 g with attachment 44 g without attachment Colors: Black and Red Attachment: On seatpost Length: 30 mm Width: 24 mm Power supply: battery or USB Runtime: between 3h and 17h depending on mode Waterproof / étanche