This is Topeak's Airbooster G2 CO2 Inflator and Pressure Gauge. Features: CO2 inflator that features a gauge as well Flow is adjustable using special feature Compatible with both Presta and Schrader valves Accepts threaded cartridges Gauge reads up to 160 PSI CO2 cartridges sold separately. Check out our selection of CO2 Cartridges. Specifications: CO2 Type: Threaded Cartridge: Not Included Valve Compatibility: Presta & Schrader Gauge: - Color: Black Weight: 45g