The Tacx Flow Smart Bike Trainer is a indoor bike trainer with the Smarts to measure your speed, power and cadence. Maintain a solid workout when you can't get outside, whether due to weather or otherwise. The flywheel is super quiet, keeping you going without rousing the whole house. Works with a few different third-party training apps to keep you in check ad even simulates inclines up to 6%; gradient. Features of the Tacx Flow Smart Bike Trainer Type of trainer: Interactive Smart trainer with electric brake Magnets: 6 Magnets Transmission: Roller, 30 mm Electrical requirements: 110-240 Volt Power indicator: None Connection indicator (ANT/BT): None FirmwAre upgradable: Yes Suitable bikes: Race, Tri & MTB , if necessary with axle skewer , 29in. wheel with Tacx trainer tyre Suitable axles: Width of rear fork: Race 130 mm, MTB 135 mm. Adapters for other widths available Supplied with: Front wheel support , Quick release for road bikes and mountain bikes (5mm) Specifications Max. power: (40 km/h): 800 Watt Max. incline: 6% Simulation of descent: No Max. torque: 15.3 Nm Max. brake force: 45 N Flywheel: Actual of 1,6 kg Mass inertia: 11.8kg (26.0 lbs) Calibration: Spin down Footprint: (lxw) 675 ? 650 mm (26.6 ? 25.6 in) Height: 410 mm (16.1 in) Dimensions when folded: 565 ? 410 ? 245 mm (22.2 ? 16.1 ? 9.65 in) Weight: 9.41 kg (20.7 lbs) Data output and Control Wireless communication: ANT+ FE-C , Bluetooth Smart open Control by: ANT+FE-C bike computers , Connect to computer via ANT+antenna , Smartphone , Stand alone , Tablet Output: Cadence , Power , Speed Read out on: Bike computer , Computer with ANT+ antenna , Smartphone , Sports watch , Tablet Accuracy: