Hello Jaime Castillo,
Thank you for writing in.
You can try your best to keep the product away from the radio or you can also connected a inductance to the output of the product.
Hope this can help you.
Best regards

Hello Chester Graham,
Thank you for writing in.
One meter is Ok.
Here is the wiring diagram of the meter:

Hope this can help you.
Best regards

Hello Dave,
You’re welcome.
If you have any questions, please feel free to contact us.
Have a nice day!
Best regards

Hello Jeff Krupp,
Thank you for writing in.
So sorry that we do not have a drawing or 3D step model of this model.
Beg your understanding.
Best regards

Hello Mark Hull,
Thank you for writing in.
The extreme working condition here means the meter can work for a long time with the parameters ranges in the extreme working condition, otherwise, if over them, it will cause damage to the meter.
So sorry that we are not sure the working environment of the all terrain powered mobility vehicle.
If the input /measured voltage and current, the working environment are within the parameter range of the meter, it will be Ok.
Here is the parameters of the meter for reference:
Parameters:
Measuring Accuracy: +/- 1% 2 digits
Displayer: LCD
Measure Range: DC0-199.9V_0-200A
Power Consumption: less than 0.5VA
Measure Speed: 2 times per second
Size: 70*40*39mm
Installation Size: 68*38mm

Extreme Working Condition
Working Temperature: -10～+50℃
Working humidity: 10～80%(No condensation)
Working pressure: 80～106kPa
Sunlight: no direct exposure

Hope this can help you.
Best regards

Hello Dava,
You’re welcome.
Here is a recommendation for you:
DROK® TDA7379 DC 12V-24V Audio Amplifier Board Module 13W+13W 4Ω Left&Right Channel 38W 8Ω Subwoofer Computer Speaker Motorcycle Amplifier
Parameters:
Type: 2.1-channel
Operating voltage: AC 12-16V, 12-24V DC
Working current: 2A or more
Output Power:
Subwoofer: 38Wx1
Left and right channels: 13W x 2
Frequency response:
Subwoofer: 22-150Hz
Left and right channels: 22Hz-22kHz
Channel separation: ≥ 40db
Signal noise ratio: ≤80db
Output resistance:
Subwoofer: 89ohm
Left and right channels: 4 ohms
PCB Size: 76x70mm (WxL)
Net weight: 145 g

Hope this can help you.
Best regards

Hello John T,
You’re welcome.
Does “set voltage” mean Cut-off voltage of the battery and full-scale voltage settings?
If yes, here is the instruction of it:

Cut-off voltage of the battery and full-scale voltage settings

Step 1:Long press the “SET” button for 3 seconds to enter the battery cut-off voltage and full-scale voltage setting state, then release the button;

Step 2: After entering the state, voltage area flash to display the current battery cut-off voltage, and use the zero battery level symbol to indicate it is the cut-off voltage setting state; then you can shot press the button to add one, long press the button can add one quickly; the range of cut-off voltage setting is 2.8 ~ 29.9V, but not more than the full-scale voltage.

Step 3: When there is no key operation more than 3 seconds, it automatically enter into the full-scale voltage setting state;

Step 4: After entering this state, voltage area flash to display the current full battery level voltage, and use the full battery level symbol to indicate it is the full-scale voltage settings state; setting method is as same as the cut-off voltage; the range is 2.8V ~ 29.9V, but not less than the cut-off voltage.

Step 5: When there is no key operation more than 3 seconds, it will automatically save, if there is no error after saving it will quit automatically, if the value is incorrect or save incorrectly, it will display “Err SAu” for 1 second, and exit.

Hope this can help you.
Best regards