Voltage reference that's built well and does what it says
For Card size 4.5-digit voltage reference generator
+Nice self contained build
+Rechargeable design, with USB-C port
-No way to tell current state of battery charge (e.g: if the LEDs are MCU controlled, they could temporarily flash a N/4 state of charge when device is turned on)
-No option to force reference on, for a longer measurement period
-Reference was supplied with a calibration done almost 4 years prior, more current would have been welcomed
-No documentation supplied with
Values were accurate to the tolerance that I can currently verify with
