Product Description: Speaker unit: 40MM diameter Impedance: 32Ω±15% Sensitivity: 98dB±3dB Frequency response: 20HZ~20000Hz Bluetooth specifications: Bluetooth V5.3 Jerry JL7006F4 Supported protocols: A2DP, AVRCP, HSP, HFP Transmission range: 10 meters Transmission frequency: 2.4GHz Charging voltage: DC 5V Talk time: about 90 hours Music time: 90 hours/35h (80% volume) Standby time: more than 200 hours Battery capacity: 800mAh; charging time: about 2 hours Product net weight: 262g Product size: 204*174*82mm Supports Chinese and English prompt sounds: double-click the M key when not paired