Features The benefits of our rolling gauge : 1. Measure the track gauge, cant without bend over your back. 2. Light weight : around 6.5kg , one person operation. 3. BT connection, data uploading and analysis system. 4. High working efficiency. Save your man power. ( 1 man with 1 rolling gauge = 4 man with 4 normal digital track gauge) Specification Model (1435mm) GJC-JJG0 Track gauge 1410-1470mm Superelevation measuring range -185~+185mm Display mode OLED display and hand-held terminal display Supply Voltage DC3.4V 5.2V (rechargeable battery) Superelevation division value 0.05mm Working temperature -30â?? +55â?? Insulation performance 1M�© Track gauge division value 0.01mm Superelevation division value 0.05mm Track gauge max indication error ±0.25mm Superelevation max indication error ±0.3mm Length 1700mm Net Weight 6.5kg