Front:Compact, durable cycling light with a machined aluminium body. It features built-in cooling fins and cutouts for side visibility. Its single LED design provides up to an impressive 500 lumens of output and eight output modes—including a Daytime Flash mode. Runtime has increased by 2.5 hours for up to 20 hours. Charging is simple with an integrated cable-free USB stick. It’s available in five colours (Black, Silver, Red, Blue, Purple) and securely straps to a variety of handlebar shapes and sizes. Rear:Compact, super lightweight USB rechargeable LED cycling taillight. Its durable co-moulded construction is minimal and has an IPX7 water resistance rating. A versatile mounting strap quickly mounts to a variety of post sizes. Five output modes offer up to 5-lumens and the custom Wide Angle Optics lens provides well over 180° of visibility. The Femto USB Rear can run for up to 15 hours and is easily rechargeable with the included Micro USB cable. A secure, threaded composite matrix cover keeps the USB port clean and sealed. The Femto USB is perfect for commuters and recreational riders looking for a simple and inexpensive way to add visibility. Available in four colours: Black, Red, Blue, White. Also available as a pair.Key Features:Front:Max Lumens: 500,Weight: 84g,Max Runtime: 20 hours,Recharge Time: 2:30 hours.. Rear:Max Lumens: 5,Weight: 23g,Max Runtime: 15 hours (in Femto mode),Recharge Time: 2:30 hours,.,.