I couldn’t find an effective “micro” tracking device for a bike (in case of theft) and I am wondering whether such thing really exists at this moment on the market. Necessary features should be:
- Minimum size and weight (to easily hide it)
- “Sleep” mode with very low consumption and long battery life
- Send GPS location via SIM at request, e.g.: when sms is send to sim number. Location Coordinates could then be identified on google maps with the mobile phone or PC.
That would be all. Led lights, voice recording, memory card, alarm sound, etc - all are useless and only increase size/weight and reduce battery life.

Did anybody see such device on the market?