The days of ugly huge lights with brackets are gone - with these Kong Frog Lights you can ride to your spot nice and safe then pop them in your pocket should you wish. When you get home you can charge them via USB. 

The rebirth of an iconic bicycle light, the Frog Bike Light: bright, versatile & fun. A design that millions of riders around the world have come to love. Powerful enough for everyday commuting or used to complement an exisiting lighting set-up

Taking cues from Knog's more advanced lights, Frog is designed with Chip on Board LED technology, enabling a high intensity light that's compact, low profile and packed with features.

And here are those features:

Punchy 40 lumen output
COB LED Technology - Efficient Chip on Board (COB) LEDs provide maximum brightness level for up to 90% of the battery burn time
Advanced Side Visibility - COB technology allows the LEDs to be arranged on a curved board, projecting light from the sides & adding to rider safety
One Button Operation - A single large, easy press button makes the operation of these lights super simple, even in gloves
Integrated Flexible Mounting System - With no tools required to mount Frog and featuring an integrated flexible strap, Frog is easily mounted anywhere
Specification:

Bulb Type - Chip on Board (COB) LEDs
Light Max Output - 40 lumens
Run Time - Up to 80 hours
Programmable With ModeMaker - No
Waterproof - Yes, IP65 rating
Light Modes - 9
Rechargable - Yes, USB-C
Low Battery Indicator - Yes
Fits Handle Bars - 22 - 32mm diameter, plus head tubes to 7.9 inches
Dimensions - H: 80 mm x W: 35 mm x L: 42 mm
Weight - 20 grams
Operating Temperature - -20 to 50 °C / -4 to 122 °F
Strap Material - Medical grade silicone
Optimum Charging Temperature - 20 to 22 °C / 68 to 72 °F (Room Temperature)
Power Source    Rechargeable Battery
Output    40 Lumen