Hey everyone. the transponders can be tricky to understand so I'll try to make this as easy as possible. there are really 4 things you need understand 1. firmware and subscription 2. what do all these damn lights mean. 3. placement 4. Battery - DO NOT USE APPLE WALL PLUGS 1. your transponder needs a yearly subscription and the latest firmware to work. to find out what you have, you need to download the mylaps software and plug your key + transponder into the computer. all the boxes on your screen should be green. if not, you need to take action. its pretty straight forward - click buttons that arent green until they are or give mylaps money for a subscription. 2. below are the lights and their meanings. 3. placement these units are directional. they cannot transmit through carbon fibre or thick metal. make sure the arrow on the carrier is pointing the right direction (usually down to track) and there is no major obstruction below it. the best place is on your fork tube. 4. BAttery - the top metal portion should blink green. if it doesnt its dead. charge it using a samsung or blackberry wall plug. if all the lights are purple, its not charging. find a different plug. refer to the light guide above. you should see a blinking light to indicate its charging.