Slinger Bag
Tech specs 
DimensionsDesigned as a slightly oversized tennis bag, Slinger is your very own portable tennis ball launcher. You can put things in it such as your racket, a water bottle and more. It even has a USB port for charging your smartphone while practicing.
Weight15 kg (empty weight)
Battery life5 hours battery life
Water resistanceSplashproof
Internal memory
Display
Sensors
Smart watch compatible
Removable
Compatible brands
Metrics 
Power
Spin
Impact location
Number of shots
Shot type
Spin type
Swing speed
Ball speed
Live tracking
Video function
Other- 144 ball launcher capacity
- Launch speed between 15km and 53km per hour
- 5 hours battery life
Links 
Affiliate link*Slinger
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