... only pump that can be used in ambulance with vehicle power: 12±1.2VTechnical Specifications: ModelZNB-XA Infusion Pump (CE ... , unattended pump after startupAdditional FeaturesReal-time shift totals, automatic power switching, mute button, system malfunctionOcclusion Sensitivity0.1-0.14 ... (optional), 50/60 Hz, 20 VABattery: 9.6±1.6 V, rechargeableVehicle power: 12±1.2 VBattery Life3 hours at 30 ml ...