The STANLEY TLM165SI FatMax Laser Measurer provides distance, area and volume calculations. It also provides indirect height measurements via Pythagoras calculation. Measurements can be taken from the front, back, tripod mount or end toe of the product. Fitted with a toe piece that allows measurement from the corner of the room. With integrated Bluetooth connectivity, enabling you to sync any data to your smart phone. Quickly capture measurements and create custom floor plans by connecting to the STANLEY Smart Connect App (download separately). Easy to operate thanks to the large colour touch screen. Other features include addition/subtraction calculator, automatic sleep mode and a memory function. The tough and durable body is rated to IP54 to protect against dust and water spray. Fitted with a 1/4in thread for tripod mounting. Runs on 3 x AAA batteries (supplied). Specification Accuracy & plusmn1.5mm Operating Range 0.1-60m Power 3 x AAA batteries (supplied) Automatic Off 90/180 Seconds Weight 100g