Universal GPS HUD Head Up Speed Display KMH / MPH Speeding Warning Plug & Play
Easy Setup--Plug & Play- Power through Vehicle Cigarette Outlet Jack,  No professional installation is required.Display MPH or KM/h - Simple Push Button Set up.Compatible with All Cars & Trucks. Use GPS Signal Guided Calculation, No wiring needed to the VSS (vehicle speed signal).Vehicle Driving Speed Display, Green Over Speed Warning Setting -- Alarm Mute Function.Auto Adjust Brightness, Via Light Sensor & Control circuit in HUD unit,  Good for day-time & night-time driving.Zero(0)mA Standby current.Push RED button at power connector to get the IGN Voltage, then switch on the HUD device.Working Voltage: 9-28 Vdc.Operation temperature: -20C to 85CPower Consumption: 100mA(typ.)The GPS HUD uses GPS to determine the true speed of the vehicle. You can fine tune or adjust speed to your personal preference above the Vehicle Speedometer. Default set at + 5KM/h.GPS signal can be disturb by some atmospheric reasons, & usually signal is weak under the trees, high buildings, mountains, continuous bridges, or interference from other signals... all GPS device do have similar problem.***A Read Me First has Added in Package to Aid the Factory Instruction Sheet.  Welcome any comments to Improve product and/or instructions.