Features Compatible with CO2 tanks with W21.8 interface, a nice CO2 regulator for planted tanks. Dual stages design, providing more stable output pressure no matter how much CO2 gas remains inside the CO2 cylinder. DC 12V output voltage, low power consumption and low noise output pressure can be adjusted from 0 to 65 PSI. The independent branches of bubble counter can be added infinitely, meeting your high demands. Made from high-quality aluminum alloy and steel, has long-lasting durability and dependability. Specifications Color: Multicolor Material: Aluminum alloy andamp steel Working Pressure: andle 15mPa Output Pressure: 0-0.6mPa Input Voltage: AC 100-240V Output Voltage: DC 12V Product Size: 17 x 8 x 4cm or 6.6 x 3.1 x 1.57inch Product Weight: 580g or 20.4oz Package List 1 x Regulator 1 x Wrench 3 x Rings 1 x Adapter 1 x User Manual (English)