By Jack C. Fun SWAGTRON T580 Bluetooth Hoverboard with Speaker and Smartphone AppReview for SWAGBOARD VIBE Bluetooth Hoverboard, T580This is a “dual-glider” style hoverboard with smartphone companion APP (connected through Bluetooth). There is a built-in speaker near the bottom of the hoverboard so I can enjoy music while riding on the hoverboard. The aluminum rimmed wheel size is 6.5″ and the tire is made of hard rubber. This hoverboard features “smart self-balancing” which improves stabilization utilizing the built-in sensors (very handy feature when getting on/off the hoverboard). The max speed is 7.5mph and it can go up to 8 miles per charge. Charging time is roughly 90-100 mins with the included charger. I like that I can check a lot of information in the companion APP once it’s paired. I can check real-time speed, current battery, and even adjust modes. There are 2 modes available – standard and advance modes, where standard modes have preset limit on settings such as max speed so it’s safer for new users. The speaker is decent and there is enough bass. I can hear the music even in a noisy environments. Overall the riding experience is quite smooth and it’s easy to maneuver the hoverboard. I have tried this hoverboard on several different road conditions, including concrete, sidewalks, grass fields, uphills ,and paved road, and it all worked without a problem.Posted by Jack C.