... hole with a charge, USB2.0 interface, SD / MMC expansion cards and LAN-IN interface, ... built-in lithium······High performance dual speaker······As a speaker,an external sound source······Recording function ... ideal, voice clear no noise.Endurance capacityThis mini sound speaker built-in high-capacity lithium battery, in ... storage: Built in 2GB memory and support SD/MMC card 1G/2G/4G(Not include)Support ...