2A Booster DC-DC Step-Up module Micro USB Input 2V-24V to 5/9/12/28V Module Features: 1). The maximum output current: 2A (recommended for use within 1A) 2). Input voltage: 2 v - 24 v 3). Maximum output voltage:&gt; 28 v (recommended for use within 26V) 4). Efficiency:&gt; 93% (efficiency of input and output pressure related) , 5). Size: 30mm * 17mm * 14mm (L * W * H) It's brand new, good quality & high performance. Free Shipping & the deliver time to USA is approx. 10-18 days after the shipment date.