Product description: 1. Horn unit: 40MM diameter 2. Impedance: 32 Ω ± 15% 3. Sensitivity: 98dB ± 3dB 4. Frequency response: 20Hz~2000Hz 5. Bluetooth specification: Bluetooth V5.3 Jerry AC6955F 6. Support protocols: A2DP, AVRCP, HSP, HFP 7. Transmission range: 10 meters Transmission frequency: 2.4GHz 8. Charging voltage: DC 5V Charging time: about 2 hours,Battery capacity: 200mAh 9. Talk time: approximately 7 hours Music time: 7 hours (80% volume) 10. Standby time: over 120 hours 11.200mAH Grade A Polymer Battery Product Net Weight: 157g 12. Product size: 182 * 170 * 71mm 13. Support Bluetooth, TF card and AUX mode 14. Support prompt tone in Chinese and English: double click the power button when not paired