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Smart Bluetooth Tire Pressure Monitoring System TPMS First Mobile Phone APP Monitoring with External/Built-in Sensor Features: 1.Smart application of the built-in Bluetooth simple connect your smart device with APP. This application allows drivers to monitor tire pressure and temperature at the same time simply by looking on their smart device. 2.Non-Stop Monitor & Reliable Alarm System continuously monitors tire pressure and temperature. The alarm system will deliver an audio alert or text when your tires are above or below a safe level that you can set in the APP. 3.Mini Compact Design - Kit includes four external plug-in sensors and one receiver, and are made from durable, lightweight material so they do not affect the tire's operation by weighing it down. 4.Easy Installation. Precise Stats. drivers can easily plug in the external tire pressure monitor sensors and set up the monitor system within 3 minutes. 5.Real human voice reminding under the condition of abnormal tire pressure. Description: ➤ 100% Brand New and High Quality. ➤ Bluetooth Transmit Power: 0dbm MAX ➤ Processor: 8-bit MCU / S08 core, ARM M0 ➤ Humidity: 95% MAX ➤ Battery capacity: 140mAh (CR1632) ➤ Weight: about 9.6g ± 1g Specification: ➤ Working voltage: 3V ➤ Working current: 540uA ➤ Tire pressure monitoring range: 100-900kpa ➤ Tire temperature monitoring range: -30 ℃ to +80 ℃ ➤ Bluetooth operating frequency: 2.4GHz ➤ Display: APP ➤ Response time: ≤ 6s ➤ Waterproof rating: IP67 ➤ Battery life: ≈400 days ➤ Sleep current: 2.4uA ➤ Working temperature: -30 ℃ to + 80 ℃ ➤ Tire pressure monitoring accuracy: ± 10kpa ➤ Tire temperature monitoring accuracy: ± 3 ℃