With this nifty little gadget you can play golf at night if the mood should take you or at least if youre a beginner with the clubs or a complete tosspot to be less polite about it the ball will be much easier to find when you send it hurtling into the bushes or a bunker With a battery life of 80 hours youll be able to keep flashing your balls for around 1000 strokes ooh madam But despite its comedy appeal the Tracer is a damn good quality golf ball in its own right The official size & weight of the USGA & Ramp A it has a tough Surlyn cover that prevents it from being damaged & losing its healthy glow It also comes with two tees & a carrying pouch at which point we have to stop before we overdose on double entendres about flashing your balls from your pouch & collapse in a heap laughing like Sid James Well just say that every golfer with a sense of humour should get his caddy to grab one of these Each Twilight Tracer comes in an attractive gift box & contains 1 x Twilight Tracer Golf Ball 1 x Twilight Tracer Golf Ball Pouch 2 x Twilight Tracer Golfing Tees regulation golf ball with an inner core that contains proprietary circuitry a lithium battery & two red LED lights that are programmed to flash at a rate of 72 flashes per second for a duration time of 5-6 minutes The proprietary design is motion activated by either striking the ball with your club or dropping the ball from Approx. 12 cm You can follow the ball from the moment it leaves your club The internal battery gives Approx. 80 hours worth of flashes which means about 1000 strikes of the ball