... Modulation 2.CD quality sound 3.WirelessTransmission: 50m 4.Backup battery Amplified Outdoor Speaker1) Remarks: Accessories: AC/DC adaptor(for Transmitter ... 1pcs), 3.5mm audio cable, User Manual.rechargeable battery inside ,if no need the battery, reduce USD4.00Packing: our standard box. Specific ... (outdoor)it is can be used 6 hours after full battery charged. Portable amplified Outdoor Speaker (with ...