Core: ARM M0 Working voltage: 3V Working current: 300andmu A Sleep current: andle 2.2andmu A Bluetooth operating frequency: 2.4GHz Bluetooth transmit power: 0dBm MAX Response time: andle 5s Display mode: APP mode Waterproof rating: IP67 Working humidity: 95 percent MAX Tire pressure detection range: 100-1300kPa Tire pressure detection accuracy: andplusmn 10kPa Tire temperature detection accuracy: andplusmn 3 Tire Pressure Smart Tire Pressure Product Specification Working temperature: -30 - and80 (external type) Working temperature: -40 - and85 (built-in) Storage temperature: -30 - and85 (external type) Storage temperature: -45 - and125 (built-in) Battery capacity: 140mAh (external type) Battery capacity: 330mAh (built-in) Battery life: about 400 days (external type, 4 hours driving per day) Battery life: about 1200 days (built-in) Weight: 8gandplusmn 1g (external type) Weight: 30gandplusmn 1g (external type) APP program features: Quick-leak alarm: When the air pressure exceeds 5Kpa within 5 seconds, the quick-leak alarm will be activated, and the andquot leakandquot icon will appear Slow leak alarm: When the air pressure value is lower than the set air pressure lower limit, the system starts the slow leak alarm, and the andquot low air pressureandquot icon appears High pressure alarm: when the air pressure exceeds the upper limit of the tire pressure, the andquot high pressureandquot alarm will be activated Low pressure alarm: when the air pressure is lower than the lower limit of the tire pressure, the andquot low air pressureandquot alarm will be activated High temperature alarm: when the temperature inside the tire exceeds the upper limit of the tire temperature, the andquot high temperatureandquot alarm will be activated No signal alarm: if no signal is received within a certain period of time, andquot no signalandquot alarm will be activated Low battery alarm: When the battery voltage is lower than the set value, start the andquot low batteryandquot alarm