The GLM 100 C can be used as a stand-alone laser distance measure or connected via Bluetooth to an app on a smart device such as a phone or tablet. Measurements can be saved for later use, applied to a photo you took with the device, or emailed to a customer or sub. Tools of the Trade covered the GLM 100 after seeing it at STAFDA and now Tool-Rank as done a hands-on review. Read more.