_? Set constant voltage
_? 4-bit tube display
_? Three input modes
_? Charging mode
_? High resolution
_? Comfortable outer shell
_? Several parameters can be displayed
_? Circuit protection
_? Anti-backflow protection
_? Overcurrent protection
_? Overvoltage protection
_? Overcurrent protection
_? Overtemperature protection
_: DC 4.0V - 13.0V
_: DC 5.0V
_: DC 0.5V - 30.0V
_: 2A
_: 15W (max. )
_: +/- 0.1V
_: 0.1V
_: 0 ~ 2.2A
_: +/- 0.05A v
_: 0.001A
_: 0 ~ 99.99 Ah
_: 0.00W ~ 15.0W
_: 100
_: 95%
_: 30mA
_: -20? ~ 85?
_: 0% -95% RH
_: 84 * 35 * 24mm
_? Ordinary power supply
_? Charger
_? LED drive power
_? Instrument voltage display
_? Test meter
_? Circuit test
_? Power conversion
_ 1 x USB 2A Power Supply Module (Up / Down)?