Scope: teachers teaching guide speech training factory site visits, business p romotion, summer camp or camping, transportation co-management, and many other activities. Power supply: 6 AA dry batteries [Voltage, 9V](Not including battery) Power: 5w Colour:Random Color(Red green lavender purple), don't accept the specified color Material:ABS Size:16cm Package Contents: 1x loudspeaker Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.