👍👍👍Product Description: ✨1. Speaker unit: 40MM diameter ✨2. Impedance: 32Ω ± 15% ✨3. Sensitivity: 98dB±3dB Frequency response: 20HZ~20000Hz ✨4. Bluetooth specification: Bluetooth V5.3 Jerry JL7006F4 ✨5. Support protocol: A2DP ,AVRCP,HSP,HFP ✨6. Transmission range: 10 meters Transmission frequency: 2.4GHz ✨7. Charging voltage: DC 5V Charging time: about 2 hours ✨8. Talk time: about 45 hours Music time: 45 hours (80% volume) ✨9. 400mAH Grade A Polymer Battery Net Weight: 208g ✨10. Product size: 204 * 185 * 84mm