Why do you choose UDISON? 100% 45 days money back, 12 months warranty hours customer-friendly service and free lifetime technical support! Elegant and concise metal one molding design, the excellent pursuit of sound quality will give you an extraordinary experience! Simple operation> Power key: Bluetooth status at startup, automatically connect with the last device. Mic and hands-free: automatic transfer speakers, a key to answer, press twice to connect to the previous call. To be used in the Bluetooth status. Conversion mode: â M â Key to switch, Bluetooth mode/ audio mode/ aux mode. Play music: â ânext, long press to increase the sound, when the sound reaches the max will be â Dong-dong â sounds. â Lâ· âplay/ pause/answer, double click: dial The last number. Parcels includes> 1 x portable Bluetooth speaker> 1 x USB Data cables> 1 x User Manual