... audio devices. Power Source: 2 AA Battery Accessories:1)USB Power Supply Cable 2)3.5mm stereo tie-in Portable stereo speaker ... * 36mm, with double the battery 5, the line with a convenient, mainly energy, you can put 3-5 hours, one more than ... Power: 3W Power supply: DC 3.0V (2 * AA batteries) Battery life:> = 7 hours Audio length: 250mm Plug: 3.5 mm L-type Weight ...