Model Number: TPMS1209C02-1-1-1-1 Brand Name: S&T Key Specifications/Special Features: System parts:1-monitor4 to 11 transmittersTransmitter is screwed onto tire valve directly to sense pressure inside tire and transmits data to monitor through RF technologySuitable for passenger car (also support spare tire monitoring), car towing one axle/two wheels caravan or 2 axles/four wheels caravan and RVsProduct advantages:Intensive data collecting proceeding, convenient to response immediately for abnormalitiesSmall sensors with weight of 9g onlyWonderful anti-vibration and anti-shock capabilityTop brand components insideAvoid damage while rubber tire is dismountedProduct functions:Full-time monitoring tire pressure and temperatureDisplay tire pressure and temperature of each wheel in turnAlarm for low pressure in three levelsAlarm for high pressureAlarm for quick leakingAlarm for transmitter troubleTechnical parameters:Monitor:Mid-frequency: 433.9MHzReceiving sensitivity: -95dBmInput voltage: 1.2V x 3 (rechargeable battery group) or 5V (lighter plug adapter)Operating temperature: -30 to +75°CTransmitter:Mid-frequency: 433.9MHzTransmitting power: -10dBmPressure monitoring range: 0 to 6bar/0 to 87psiPressure monitoring precision: ±0.1bar/±1.5psiOperating temperature: -40 to +85°C