... Size, mL 20/30/50 Features:1. Audible and visual alarm for occlusion, empty, near empty, low battery, end of infusion ... 11. Power Source: AC100-240V, 50/60Hz; Internal Battery, DC12V car charge12. One-key operation makes setup easy and simple13. Syringe ... rechargeable Li battery volume≥1,600mAh 4 hours internal battery backup; DC 12VKVO Speed1ml/h, can be modified from 0.1 ...