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) 400mAH Grade A Polymer Battery Net Weight: 208g 9.Product size: 204*185*84mm