👍👍👍👍 Product description: ✨Speaker unit: 40MM diameter ✨Impedance: 32Ω±15% ✨Sensitivity: 98dB±3dB ✨Frequency response: 20HZ~20000Hz ✨Bluetooth specifications: Bluetooth V5.4 Jerry JL7006F8 ✨Support protocols: A2DP, AVRCP, HSP, HFP ✨Transmission range: 10 meters Transmission frequency: 2402-2480MHZ ✨Maximum RF output power (EDR): 7DB ✨Modulation Type (EDR): GFSK, π/4-DQPSK ✨ Charging voltage: DC 5V Charging time: about 2 hours ✨Call time: about 45 hours ✨Music time: 45 hours (32 hours on ANC) (80% volume) ✨Standby time: more than 200 hours ✨400mAH battery capacity ✨Net weight of product: 210g ✨Product size: 195*184*84mm