T?i ?ng d?ng 123B trên h? ?i?u hành Android nhanh chóng T?i application 123B trên h? ?i?u hành IOS123B/124B/125B End users Guide The readout reveals the voltage difference between the Cursor Measurements two cursors plus the voltages within the cursors in relation to Cursors permit you to make precise electronic measurements the zero icon (-).