(*1) 0 dB = 1 V Power Source Alkaline battery (LR6): 6 pieces (9 V DC) or 4 pieces(*2) (6 V DC) Rechargeable nickel metal hydride (Ni-MH) battery (HR15/51): 6 pieces (7.2 V DC) or 4 pieces(*2) (4.8 V DC) Black manganese battery (R6PU): 6 pieces (9 V DC) or
* 0 dB = 1 V Power Source R6 battery × 8 (12 V DC) 12 V DC/0.8 A or more (AC adapter or DC power supply unit usable) Rated Output 6 W Maximum Output 10 W Battery Life Voice: Approx. 10 hours (R6P manganese dioxide battery use) Whistle: Approx.