The new SL3 active rangefinder could be everything you ever wanted in a distance measuring device combining GPS and laser functionality.This is very nice piece of advanced hybrid golf tech straight from Seoul delivered by Voice Caddie company and it will definitely make an positive impact on the golf equipment market for sure .Given the tech it's very easy to use and provide sufficient and accurate guidance all by the small marginal errors obviously ,but within acceptable tolerances of the technology used , total technological advancement and technical aspects availability even including any limitations it still makes this hybrid range finder mega interesting tech combo for golfers .What really sets the SL3 device apart are the GPS features.You can choose to pair it with an APP on your smartphone or not ,it's completely up to your decision .If you prefer to switch your smartphone off and go manual and oldschool you just show up to the golf course ,turn on the rangefinder, put it in golf mode and SL3 will find the satellite and tell you where you are on the course. There’s no need to enter courses or advance the holes.No need for that at all. Very convenient.Very intuitive and very user friendly design.I personally like the fact this device offers both: an accurate and convenient same as easy to use laser rangefinder with a color touch LCD screen where you can change the settings the way you like it and most importantly see the maps of the holes and the greens with the ability to obtain all other sorts of information.Very Convinient .Support.This device provides really decent support and excellent acces to extensively and continuously expanding non stop updated worldwide green maps database which is for me if not the main thing than at least second important thing to the GPS device itself is the flawless support of the GPS library which is again constantly updated adding new green maps and putting more view features..and this is great,real value for the money here !Conclusion.With this SL3 device it doesn't matter if you’re trying to figure out the green, how to uphill or downhill or what pitch shot is or not .It doesn't matter how much you could ever need a hybrid GPS rangefinder or not but I want you to consider this: on drizzly days,or foggy mornings where you can’t always shoot the pin the way you want it ,having the GPS feature in your hand can be more than invaluable when it works great on blind shots completely regardless of the luxury or a smart practicality in question followed by your hand.It doesn't matter which .Its a convenience and pure fun followed by a real pleasure making golf experience even more satisfying thanks to the right use of the technology put in the right place and right application backed up by the massive database and never ending support guiding your hand from the clouds above making your human golf experience worth of your time.Pros.Convenient,fast and accurate,Can measure all sorts of course features and got lots of convenient settingEasy use and easy to read greensComfortable to hold and premium feelCons.Requires regular recharging . Bit energy hungry GPS .