HitCar DC 12V 至 5V 电源逆变器 Mini/Micro USB DC 3.5 硬有线转换器套件 车载充电器电缆 适用于 GPS 平板电脑 PDA DVR 录机EA-HW02_MIL3M 3.5 Meters Cable Mini USB Left Angle 3M
- 同步认证，转换率是 96% 或更大，非常低热
- 超薄、小尺寸、*率、易于安装和使用，输入电压：DC8-20V（12V 可变为 5V）
- 过电流保护、短路保护、防水设计，线长：135 厘米
输入电压：DC 12V (8V-22V)
输出电流：3.6A（*大值），可以长时间在 2.5A 以下。
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Unfortunately, that small transformer is not properly filtered and puts out an incredible amount of Radio Frequency noise - it made my FM stereo full of static and completely unusable. When the connected device (2 different dash cams) is powered on through this adapter all you hear is static; unplug the USB connector and all static is gone. I ordered a different power supply (https://www.amazon.com/gp/product/B06XTBPYS2) and it worked perfectly. I tested the Garmin replacement and two other power supplies (Garmin and Magellan cigarette lighter cables) by taping all 3 of them directly to the radio antenna wire as it runs up the A pillar and testing both dash cams - none of the name brand power supplies caused any radio interference even when toughing the antenna wire - which is how a well-designed power supply should behave.
On the plus side, the HitCar adapter wires are copper (looks like aluminum on the Garmin one), but it is very small gage (24 AWG).
Bottom line, get a name brand adapter. (like the Garmin linked above - the red and orange wires can be connected together if you do not want to use "parking mode" or do not have a Garmin device - I am using it with a Magellan dash cam.)
One of the things that I really like about HitCar's hard wire kit is that its inverter box is much smaller and closer to the USB port, unlike Spy Tec's cable that places this power inverter box right in the middle of two cables, making it nearly impossible to hide it (in some vehicles) if your intention is to run the the cable along the "A" pillar to completely hide it. This cable from HitCar has an inverter box that is 2/3 smaller than Spy Tec's and also intelligently placed closer to the USB port.
I used an Add-a-fuse cable to connect it to my vehicle's fuse box, which is located under driver's side near the door. The cable length was more than enough to reach the fuse box from the rear view mirror, hiding it inside A pillar.
I have been using it for more than 3 weeks now and it powers on the dashcam every time the vehicle starts. I highly recommend this cable for those looking for a dashcam hard wire cable.
update 2017/03/20: amazing customer service issued refund almost instantly so review gets bumped to 3 stars. I am ordering a replacement now and will update review with new unit.
update 2017/05/12: finally got around to installing the replacement unit and it works fine powering my Viofo A119 dash cam by tapping into my power mirror connector on my 2015 Lexus IS250.
Find the GND & ACC wires that provide power when car is turned ON (you will need multimeter for this).
Cut the USB mini converter wire to desired length
Use butt connectors to connect it to rear view mirror power source and
Run the wire alongside the pre installed wiring of rear view mirror.
Here're pictures of my Toyota Sienna project