4-POINTS OF SCREEN ORIENTATION ; 2 VERTICAL, 2 HORIZONTAL . UPDATED BUTTON HIERARCHY FOR EASY, INTUITIVE CONTROL. UPDATED BUTTON HIERARCHY FOR EASY, INTUITIVE CONTROL. TUNER CALIBRATION RANGE OF 410-480HZ. IMPROVED PIEZO CONTROL ALLOWS FOR A BETTER TUNING EXPERIENCE IN NOISY ENVIRONMENTS. CR2032 BATTERY INCLUDED. AVAILABLE IN SINGLE AND TWIN PACK