Options for this item: Colour:Red Colour:Red 1. Internal DSP Professional Digital Sound Processing Chip, Self -Developed Waist Canto Algorithm, Easy to solve the problem of high curtain, low bass down down.2. DIST-in 7.4V / 3000mAH Polymer Lithium Battery, DC5V-2A Type-C new generation charging cable charging.3. Reverb and treble / bass, 32 level microphone and device volume setting 7DB supports the loud setting.4. Bluetooth version: 5.05. Playing time: about 5 hours6. Charging time: about 1.5 hours.7. Transmission distance: It is greater than 8 or equal to it.8. Frequency range: 20hz-20khz9. Power Supply Voltage: 5V10. Output Power: 10W11. Expanded memory: 32GB (not included)