Streamlight Switch Module Fits: SL-20X

C4 LED technology for extreme brightness
IPX4 rated design. water resistant operation
1 meter impact resistance tested

Unbreakable polycarbonate lens with scratch-resistant coating
Light output: high – up to 24,000 candela (peak beam intensity), 185-Lumen; medium – up to 12,000 candela (peak beam intensity), 95-Lumen; low – 6,000 candela (peak beam intensity), 50-Lumen
3-cell, 3.6-Volt sub-C NiCd battery is rechargeable up to 1000 times

Extra-Large Display so you can see your key running, cycling and swimming stats at-a-glance.
Graphical Training Partner helps you train more effectively with full-screen graphics and three unique training modes.
One-Button Control allows you to easily navigate through menus.

Easy-to-install – Simply attach the sensors and ride. With no magnets or other exposed parts to line up, these sensors are easy to install, maintain and move between bikes.
Speed sensor – Attaches to the hub of either wheel and self-calibrates with your Garmin Edge to give you accurate speed and distance at all times, including indoors on the turbo trainer.
Cadence sensor – Fastens to any crank arm size and measures pedal strokes per minute so you can get the most out of your training.