If you need the dongle to do the firmware update and basic diagnosis for the short-term use only, you are able to rent the dongle set now! You will only need to take care of the return shipping cost to send back the dongle to our service center within 30days to get the refund, but the dongle set has to be kept in the good condition and function.

**In case you want to keep the dongle forever, please go to purchase via this link:
https://www.kynamicservice-shop.com/store/products/deas001-kynamic-unit-e-e-link-dongle

- Dongle set including the dongle cable - charging port type
- Compatible with KY-BC250 System only
- Compatible Bike Models: Whyte RheO 2 & RheO 3, Sonder El Camino.