Mrt transponder

[dwp102]

Which one do I need ?! 852 or 854. Many thanks

https://mrtwebshop.com/epages/e2f57113-4e1d-45e9-b4ad-7bea7fc8783a.sf/en_GB/?ObjectPath=/Shops/e2f57113-4e1d-45e9-b4ad-7bea7fc8783a/Categories/Timing_Equipment

[Yorkiebar]

Either - the only difference is the colour of the wires. :)