... lithium battery 3. SD/USB/TF/FM 4. ODM OEM Android Robot mini Speaker Specification: 1, Frequency response: 90HZ-20KHZ2, Load ... nywhere 7. Support SD/TF Card, FM radio, Auto search 8. 40mm internal magnetic, high-quality aluminum and iron boron speaker ... lithium battery, when the maximum playing, support for 5 hours. Android Robot mini Speaker