... -in rechargeable lithium battery 3. SD/USB/TF/FM 4. ODM OEM Android Robot mini Speaker Specification: 1, Frequency response: 90HZ-20KHZ2 ... , Load power: 3W3, Distortion : ≤0.3%4, Speaker Unit: 40mmx25, SNR:> 85dB 6, Charging power: USB 5V 7 ... 7. Support SD/TF Card, FM radio, Auto search 8. 40mm internal magnetic, high-quality aluminum and iron boron speaker. 9. Built-in ...