The days of CO2 cartridges are officially over. The SILCA Elettrico MICRO packs the power of 4+ CO2 cartridges in a package about the size of an AirPods case. With auto-cutoff at 72 psi (no gauge), it&';s safe for use with hookless rims. A single 25-minute charge provides enough power to last for months, ensuring it always has your back. Auto shutoff at 72 psi for hookless rim safety with no gauge Accurate to 1% when used with the hose and delivers the power of 4 CO cartridges TSA-compliant and safe for carry-on travel USB-C rechargeable with a 25 to 60 minute charge time Item Specifications Color Gray Compressed Gas Inflator No Defined Color Gray Includes Gauge No Includes Mount Bracket No keyword search e pump keyword search electric pump PSI 72 Valve Compatibility Presta and Schrader Weight 111 Silca Elettrico Micro Inflator Frame Pump UPC: 810093162970