Model : PTM-816 * Cooperate with the type K Temp. probe. * Range : -50 to 230 oC x 0.1 oC. * Unit : oC, oF. internal adjustment. * Meter with the probe, all in 1, easy operation. * Hold function to freeze display value. * Build in reverse display button. * IP-67 Water resistance, heavy duty. * DC 1.5V battery ( UM-4, AAA ) x 4.