Compact design fits easily in the pocket. One-button operation makes it easy to use. Internal lithium-ion battery is chargeable with USB and can take up to 1000 measurements on a full charge. Takes metric or imperial measurements. Working Range: 0-16m Accurate to +/-6mm Calculates Distance Laser Class 2 Not Smart or Bluetooth Compatible No IP Rating: Indoor Use Auto Power Off in 1 Minute Overmould Grip for Slip & Drop Protection Working Range: 0-16m Accurate to +/-6mm Calculates Distance Laser Class 2 Not Smart or Bluetooth Compatible No IP Rating: Indoor Use Auto Power Off in 1 Minute Overmould Grip for Slip & Drop Protection