Spanninga JET rear light JET lights can be easily mounted to your bike with the flexible and compact mounting system. The wide switches are easy to use. JET lights are equipped with an LED indicator, which flashes when the battery is low. When it flashes, you only need to connect the rear light to your laptop. Within a few hours it is ready to use again. Equipped with a micro USB plug (and included cable). It is environmentally friendly, because no additional batteries are needed. Light source: 2 LEDs Power source: Li-Po battery via USB Autonomy: > 8h / 30h (flashing) Functions: continuous / flashing Weight: <36 grams