The Singing Machine SMG-319 Instruction Manual page 12

AUX IN SECTION
Specifications are typical. Individual units might vary and are subject to continuous
improvement without notice and/or incurring any obligation.
2.5 WATTS (RMS)
3.5mm stereo headphone jack
DC 12V 1A
DC 12V (8 x "C" CELL)
(BATTERIES ARE NOT INCLUDED)
9.0 x 4.4 x 13.0 inches / 22.9 x 11.1 x 32.9 cm
2.95 lbs / 1.35 kgs
E11