Pocket portable size: 120x76x30mm, put it into your pocket, save , save cost, easy to carry. Have full-function operating mode, user can enter any value through digits buttons, the calibrator can output signal directly. Have MODBUS Master and MODBUS Slave functions (No Hart functions). High accuracy 0.025%+1/2 digits, high reliability and stability. 2200mAH re-chargeable battery inside, very suitable and convenient to use it in applications indoors or outside industrial site., Manufacturer: Akfldms