Automatic or manually activated stapling. Quiet performance. Insert paper for automatic stapling or press the comfortable grip and let the stapler motor do the work. Has a stack height gauge and staple placement guide to go along with the convenient plug-in or battery operation. Jam-free stapling of up to 20 sheets with Swingline S.F.3 or Optima Premium staples. 7.8 inches length, 5.6 in. width, 3.3 in.height, weight 1.2 lbs.Power supply 6AA(LR6) alkaline batteriesor AC adaptor 7.5V DC,1000mA. Was purchased for $116 U.S.