Elite Direto XR - Read the add!
This served me well until the power readings went nuts and became unreliable. It will either read high, low, or not at all. Cadence/speed doesn't work either, but difficulty DOES work. If you have a power meter already this will currently work fine with Zwift etc. and will adjust for slopes. Or if you're clever, perhaps you can fix it. No guarantees with this one. Comes with all adapters.