Sunny Health & Fitness Treadpad Flat Folding Treadmill with Premium Sound System ? SF-T7970,Black $563.38 Make sure this fits by entering your model number. HIGH PERFORMANCE SPEAKER: Run, Walk or Dance on this treadmill that includes an exceptional speaker. Sync your mobile device to Bluetooth to play your own playlist or watch your favorite Sunny Health & Fitness online training videos! DUAL FUNCTION TREADMILL: Achieve speeds of up to 7. 5 MPH with the rail up in running mode. When the treadmill is folded flat, it becomes a walking treadmill with speeds up 3. 75 MPH.