-------------✨Product Feature✨---------------- Speaker unit: 40MM diameter, impedance: 32 Ω± 15%, sensitivity: 98dB ± 3dB Frequency response: 20Hz~20000Hz Bluetooth specifications: Bluetooth V5.4, Zhongke Lanxun AB5656B Supported protocols: A2DP, AVRCP, HSP, HFP Transmission range: 10 meters Transmission frequency: 2402-2480MHz Maximum Radio Frequency Output Power (EDR): 4dBm Modulation type (EDR): GFSK, π/4-DQPSK Charging interface: USB-C Charging voltage: DC 5V, charging time: about 1.5 hours Talk time: approximately 32 hours, music time: 32 hours (80% volume) Standby time: over 180 hours Product Material: ABS+Silicone+PU Leather Charging indicator light: It displays a red light when charging and turns off when fully charged. 300mAH 。 A-level. Polymer Battery Net weight of product: 197g Product size: 196 * 190 * 89mm