Add consistency to your next game of darts without messy and sticky throw lines using the Viper Laserlite Dart Throw Line. This high-tech laser line marks where the player should stand and is easily adjustable to accommodate both practice and competition. Set it once and get to playing without worrying about adjusting it during the game. Compatible with most Viper electronic dartboards. FEATURES: Shows appropriate standing distance for dart games Line adjustable for both practice or competition Attaches to most Viper electronic dartboards Avoids mess of tape or chalk Powered by electronic dartboard 90-Day Limited Manufacturer's Warranty Style: 37-0025