Brief description the 502se elliptical features a sturdy base with wide stabilisers for added strength the chain driven flywheel is fitted to the front of the trainer and is chain driven for a smoother workout the tension is manually controlled using the micro tension adjustment knob fitted to the base of the trainer chain driven system this trainer uses a high quality chain drive for a super smooth workout handlebars the handlebars are ergonomically designed and coated in soft touch foam