Careud for RV Truck 6 Tire Sensor Tire Preure Monitoring System Tool TPMS Features:LCD display, Waterproof and dustproofReal time monitoring, individual tire data showed.Wirele transmiion, no wires connection is needed.Visual and audible alarm.Tire leakage, high/low preure and high temperature alarm. Repeater:Q:What is Repeater used?A:It is used to make sens stronger. Q:How can I know If Ineed to use Repeater or not?A:If your RV or Truck is over 10 Meter, need to use.If not, monitor can not get the sens or not stable. General:Brand: CAREUDModel: T460WFPreure unit: Bar / PSI (loptional) Specifications:Sensor:Operating frequency: 433.92MHz 15MHzOperating voltage: 2.1-3.3VOperating temp.: -40 - +105Truck Testing Preure: 4-8 BarRV Testing Preure :6.9-12.2BarSensor size: 15mm * 23mmDisplay:Operating frequency: 433.9215MHzBattery Type: Build on with lithium battery USB power line for charging Package List:1 x Monitor6 x External sensor1 * Thftproof Nut1 xUSB Powe Cord1x Anti- Ship Mat6 x Anto-proof nuts1 xSpanner1x Open Cover Spench1x Repearter( Optinal)