The amount of topspin generated can be managed by altering the ball speed and elevation angle settings to find a launch sequence that works best for your game. Slinger is also easily moved on the court and we suggest testing varying court placements to find the best mix of placement, speed, angle and ball frequency for your level of play.

No. It is for safety reasons that the Slinger Bag will only begin launching with a 2-step "ON" process (On switch "ON" first and then press "ON" on the remote to activate either the Launcher or the Launcher and the Oscillator).

Yes. Slinger Bag has a remote control. The remote operates both the Launcher and the Oscillator "ON/OFF" from across the court.

All Slinger Bags have a 12 month statutory Limited Warranty. This can be extended to 3 years Limited Warranty by registering your Slinger Launcher at - Read the full warranty policy on our support page

NO! Slinger is a battery operated ball launcher. This means it is extremely portable and easy to setup. The Slinger cannot be connected to power when being used and the battery should be charged when not in use.

The main Slinger Bag itself does not oscillate. However, Slinger have created a unique Oscillator plate on which the Slinger Bag can sit and which allows the Slinger Bag to oscillate. The Oscillator is included in all of the Grand Slam Packs.

On the top of your Slinger ball tube you will see 2 ball holder clips. To release the tennis balls simple push those two clips outwards to open the ball escape opening.

Slinger Bag is powered by a premium quality Lithium Ion battery. To fully charge the battery will take approximately 4 hours. The Slinger smart charger cable will monitor when the Slinger Bag is fully charged and will automatically reduce to a charge pulse at that point to prevent any undue damage to the battery.

Slinger is currently available to order from FK Sports Nordic for all residents in Denmark, Sweden, Norway & Finland. To check if Slinger is distributed in your region please go to Slingers own website -

  • Ensure that you have removed the plastic cover from the magnetic connector at the end of the cable.
  • Ensure that the magnetic connector on both the end of the Oscillator cable and on the Launcher control panel are free from dirt / dust.
  • Press "ON" for both the Launcher and Oscillator button on the remote control
  • The Oscillator will take 15 seconds to get powered up correctly before oscillation starts.
  • If, for any reason, these steps do not work please contact the Slinger support team at for further assistance.