Long lasting battery; Battery lasts up to 450 hours (when using AM, speaker, and alkaline batteries); Scale scale markers; Easy to read uppercase dial markings. LOUD VOLUME: Equipped with a 3.5 inch (9 cm) speaker for loud volume. Can be heard clearly even outdoors. Equipped with a digital tuner. Easy to select; Equipped with a light tuning lamp that is easy to select from. Comes with convenient shoulder belt; 8.4 inches (214 mm) x 5.1 inches (130 mm) x 2.4 inches (60 mm); Does not include protruding objects such as handles, buttons, shoulder belts, knobs, etc.