Specs Tuning Rangee 0 (20.6 Hz) - C8 (4,186.0 Hz) Reference Pitcha 4 (435- 446 Hz) Tuning Accuracy ± 1 Cent Power Supply Dry Battery 6F22/6Lr61 (9 V) Type, Ac Adaptor Dc 9V (Psa Series; Optional) Current Draw 30 Ma Expected Battery Life Under Continuous Use (Carbon): Approximately 8 Hours *This Figure Will Vary Depending On The Actual Conditions Of Use. Accessories Dry Battery 6F22 (9 V) Type (Carbon), Owner’S Manual, Leaflet (“Using The Unit Safely” And “Important Notes”), Information Size And Weight ( Including Battery ) Width140 Mm 5-9/16 Inchesdepth80 Mm 3-3/16 Inchesheight30 Mm 1-3/16 Inchesweight190 G 0 Lbs. 7 Oz.