Features:    *Large LCD with multiple parameters display simultaneously    *pH, Conductivity or Salinity or TDS, Dissolved oxygen & Temperature    *Handheld fashion housing with IP67 waterproof design    *Auto temperature compensation    *Auto ranging for conductivity measurement    *Multiple points calibration: 3 points for pH, 1point for D.O.,4 points for conductivity    *Manually altitude/salinity compensation for D.O. measurement    *99 points memories w/ recall function    *1 hour auto power off                Specifications:    PH range/resolution& 65306;2.00-12.00/ resolution:0.01        PH accuracy& 65306;+/-0.1     Cond range:0-199.9,0-1999us/cm,0-19.99,0-150.0mS/cm     Cond. accuracy& 65306;+/-1%F,s+/-1digt     Cond resolution& 65306;0.1uS/cm, 1uS/cm. 0. 01mS/cm. 0.1mS/cm     TDS. Range ns& 65306;0-1999°1,0-1999·1ppm.0-19.99°.0-150.0ppt     TDS. Accuracy/res& 65306; +/-1%FS+/-1 digit; res: 0.1, 1ppm: 0.01, 0.1ppt TDS Factor& 65306;0.30-1.00     Salinity range& 65306;0-10.00ppt: 0-42,ppt(SEA WATER)     Salinity accuracy/res& 65306;+/-1% F S+/-1 digit: res: 0.01 ppt. 0. 1ppt D.O. range& 65306;0.0-199.9%(0.0-30.0mg/L)     D O. Accuracylres& 65306;+/-3% of F.S. +1 digit res: 0.1     Temp.range& 65306;-5~60,0°c Temp. Accuracy/res& 65306;+/-0.5c:0.1     Compatible probe& 65306; PH probe, EC probe and D.O probe  Could be all used on one meter at the same time LCD size(mm)& 65306;32.5(H)X54(W)     Operating temp. &RH%& 65306;0-50°c   Humidity <B0%     Storage temp. &RH%& 65306;0~60°c      Humidity 90%                    Dimension( mm): 169(L)x78.3(W)x43.4(H)      Power: 4PCS AAA Batteries& 65288;Not Including Package& 65289;     Standard Package: Meter/Manual/Carry case Standard Probo& 65306; PH probe/Cond. Probe/D O Probe/D O. Electrolyte 2 Membrane set/cable clip (User can decide which probe to be included as standard)                    Notes:Shipping company does not accept liquids and powders