Description Product Specification: “Bluetooth Version: 5.2 (Airoha AB1562F) Supported Protocols: HSP, HFP, A2DP, AVRCP Battery Capacity: 45mAH Charging Capacity: 500MAH Standby Time: 300H Working Time (with Charging Case): 30H ANC: Support Color: Black Talk Time: 9H Play Time: 8H Charging Time: 1H Best Transmission Distance <1M Maximum Transmission Distance: 10M Voice Prompt: Support Impedance: 32Ω Sensitivity: 108dB Working Frequency of Bluetooth: 2.402GHz-2.480GHz Frequency Response Range: 20-10,000HZ Ambient Light: Burst Texture Multi-Point Connection: Nonsupport Wearing Style: In-Ear User Manual: Chinese and English Interface: Type-C Included Accessories: USB Charging Cable, User Manual”