Roller trainer adjustable and portable connects wirelessly using bluetooth 40 technology incline up to 15 braking system engine brake operation chain properties foldable training computer speed performance maximum resistance 2 000 w accessories adaptor 220v quick release compatible with iphone 3g iphone 4 iphone 4s iphone 5 ipad touch ipad mini incline max 15 weight 22 kg data transfers bluetooth smart ant colour black application indoo