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Product Introduction: The X91 TPMS intelligent escort instrument continues to adopt the concept of combination including TPMS tire pressure monitoring system, GPS car head up display and the on-board slope meter, Which greatly improves the safety escort level for users, also widely favored by a large number of off-road enthusiasts. Features: - Combination of TPMS tire pressure monitoring system, GPS head-up display, vehicle slope Meter. - Built in high-precision dual-channel satellite GPS signal module. - All automatic monitoring of vehicle driving conditions. - Adjust the screen brightness based on light intensity detected by the light source sensor. - Featuring in high sensitivity with free-wheeling rotation. - Featuring in high-definition display with high resolution colored screen. - Featuring in carbon fiber exterior body design. - Start when engine on, auto-off (sleep model) when engine off. Specifications: Power Supply: DC 10V ~ 30V Voltage Range: DC 5V ~ 30V Voltage Precision: 0.5V Pitch Angle: -40°~ +40° Roll Angle: -40°~ +40° GPS Cold Start Duration: 32s (Average) GPS Hot Start Duration: 1s (Average) GPS Update Rate: 1S Time Error: < 1minute Working Temperature: -40℃ +80℃ Speed Precision: < 0.36Km/h Wireless Transmission Frequency: 2.4GHz Dimension: 70*59*59 (mm) Weight: 203g Warm Tip: ※ Please test the product after installing the whole complete set of sensors, that means, please start the vehicle for a certain distance and observe whether the receiving host normally receives data or not. If not, please contact customer service for technical consultation.