... features: 40MHz analog bandwidth, 100MHz real-time sampling.USB connectedDSO-2090 USB uses USB that supports plug’n play, with 12Mbp communication ... Offset level +/-4 divisions Coupling AC, DC Offset increments 0.02 div Impedance 1M ohm DC accuracy +/-3% Input protection ... Yes Range 10 divisions Trigger level +/-4 divisions Settabillity 0.02 div increments Math Measurements Vp-p, Vmax, Vmin, Vmean, ...