Up for sale is my Hydrogen Sports PROTON tennis ball machine in excellent, lightly used condition. One of the most advanced portable ball machines on the market — designed by a former Apple engineer and loaded with smart features you won't find on traditional machines at twice the price.

  • Condition: Excellent — lightly used, fully functional, no damage
  • Includes: Power adapter/charger + collapsible ball hopper (holds up to 100 balls)
  • Weight: ~17–20 lbs — half the weight of a typical portable machine
  • App Control: Full iOS & Android app (Proton Control) with tap-to-aim targeting, custom drill builder, and pre-programmed routines
  • Apple Watch compatible: Control shots from across the court in real time
  • Speed: Up to 70 mph
  • Spin: Up to 3,000 RPM (topspin and backspin)
  • Motorized elevation: Automatic up/down adjustment for different ball trajectories
  • Oscillation: Full side-to-side programmability
  • Coach Mode: Shot-on-demand feature for coaches
  • Hopper: Origami-style collapsible, holds ~100 balls

A niche but passionate community of players swear by this machine. Extremely hard to find used. Retails for $1,695 new — great opportunity to get one at a significant discount.