SMAKN&reg; DC-DC BUCK Step down Converter Power Supply Voltage Volt Regulator Regulated 4.5-40V 12V To 5V 2A USB Charger Voltmeter Display Wide range of voltage meter: DC4.5V-40V. Output current capability 5V/2A (input voltage to a regulated output voltage of 5.0V when the 6.5V-40V). Net Weight: 13g Main Color: Silver Tone, Black Size58mm*21mm*10mmL*W*H