Streamlight 68251 4AA Propolymer Flashlight, Yellow

GPS System Maps Your Route and Records It – Wirelessly Record Your Fitness, Exercise & Training Bike Performances
Connect to PC and Review Your Performance Data in Maps, Graphs & Charts – Saves 80 Hours of Performance Records
Provides Timer, Calories Burned, Speed and Distance Readings – Built-in Barometer/Altitude Measurement

Three C4 LEDs, impervious to shock with a 50,000 hour lifetime, and 2 user programmable ultra-bright blue tail light LEDs
Zero-maintenance 6V, 12Ah sealed lead acid battery is rechargeable up to 500 times; red and green LEDs provide charge status
High-impact ABS thermoplastic housing, rubberized impact bumper and lens ring, and cushioned-grip handle

Detect fraudulent currency and IDs see blood and body fluids for crime scene investigation, hotel inspection and hunting
Detect leaks during vehicle or hvac repair, rodent detection, identify repairs in pottery paintings and rugs
5 high powered UV LED Bulbs 1,000 hour LED life 365-400 nanometer wavelength

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.