If you are talking about a compact laser range finder, it should almost be the Stanley TLM30. This is because it is so small that it fits in your pocket. You can take it everywhere with ease. This is useful if, for example, you want to take a quick measurement with a friend, neighbor or grandmother. You measure distances between 17.5 centimeters and 9 meters. In addition, you have a measurement deviation of 6 millimeters. The laser works on a rechargeable 5-volt Li-Ion battery. If the battery runs out, then simply recharge it with the supplied USB cable. This way you can use your TLM30 anytime and anywhere.