Features: Support USB cable charging and solar charging,ensuring that the tire pressure monitoring system can work continuously. Our TPMS has five alarm modes, fast leak alarm, high / low pressure alarm, high temperature alarm and sensor low pressure alarm. Big LCD Screen Auto Backlight - Easy Reading Under Any Light Environment] Supports smart backlighting. Receiver angle adjustable, Support up and down 45 & left and right 45 adjustment. Split support, more convenient disassembly and assembly. Specifications: Receiver parameters Power supply mode:USB power supply,Solar Power supply Working voltage:DC 5V Pressure unit:bar / psi Temperature unit: / Operating temperature:-20 -- 85 Storage temperature:-40 -- 125 Built in sensor parameters Pressure range:0-5.6bar / 0-81psi Low pressure alarm value: 1.8ba High voltage alarm value: 3.2ba Pressure accuracy 0.1ba / 1.5psi Waterproof grade:IP67 Battery built in CR2450 button battery (non removable battery) battery life: 2-3 years External sensor parameters Pressure range:0-5.6bar / 0-81psi Low pressure alarm value: 1.8ba High voltage alarm value: 3.2ba Pressure accuracy 0.1ba / 1.5psi Waterproof grade:IP67 Built in CR1632 button battery (removable and replaceable) battery life: 1.5-2 years Package list: 1xReceiver 4xsensor 4xanti-theft nut 1xanti-skid pad 1xUSB cable 1xwrench