Look good, but don't light up These look cool, but I can't get them to light up. No way to read the instructions, and I've tried every possible configuration with the batteries. So - either they don't work, or the included batteries were ...
Features
 |   Publisher : messingschlager Company : Ventura List Price: Our Price: $5.99 |
Features
- 1 red blinking LED
- Starts on movement
Product Description
The Ventura LED Valve Caps are perfect for increased visibility and safety! These blinking caps each include 1 LED light. The auto flashing starts when your bicycle tires begin moving. The Ventura LED Valve Caps are designed for use with standard schrader valves.SimilarProduct
Customer reviews
Look good, but don't light up 
by .. Josh King ()
These look cool, but I can't get them to light up. No way to read the instructions, and I've tried every possible configuration with the batteries. So - either they don't work, or the included batteries were dead.
broke same day. 
by .. Heather (L.A., CA)
The batteries get hot sitting the light, no on/off method - always on, broke as soon as I opened to remove batteries.