shockley DC VoltAmp 100V and 150W Boost converter (2 VoltAmp Meter + 2 Boost Converter) Meter Electronic Hobby Kit

Shockley 0-100V 10A DC Volt and Ampere Meter and DC-DC Convertor combo Specifications: Working current of Meter itself:?20mA Voltage Measuring range: DC 0 - 100V Current Measuring range: DC 0 - 10A Voltage resolution (V): ±0.1% Current resolution (A): ±1% Display: 0.28" digital tube, Two color blue and red Operation Temp: -10?-+65? Refresh rate: about 300mS / times Dimensions:48mm*29mm*22mm - The 150W DC-DC Step-Up Adjustable Power Supply is well into the heavy-duty end of the spectrum @ 150W. - This can be manifested from the huge toroidal inductor and dual heatsinks. - The 150W adjustable power supply module is useful for automotive, where standard 12V battery power can be boosted to 19V for use as a laptop/computer power supply, or to 18V or 24V for other applications requiring higher voltages. It has an onboard LED which illuminates when the voltage is applied. It is important to note that there is no reverse polarity protection, hence a series diode is recommended. It should not be used for high loads. - Be cautious of the input polarity in order to protect the module.