I gave a 4 star review instead of 5 stars because the manual is only in Chinese. No English instructions. Can accept it for a product that has a very simple operation, but for this, an English user manual is really needed, if I have to use it beyond the very basic measurement features.
it is ok to measure. but voice and manual is clinches. No app for Bluetooth, but can connect to phone using third-party tools. Case not like in picture, but usles simple bag.