The surface is sprayed with metallic paint with colorful breathing lights Noise-canceling calls(DNS), charging 10 minutes to play 180 minutes Bluetooth version: 5.3 Talk time: 7H Play time: 6H (30H, Play with charging case under 80% volume) Charging time: 1H Battery capacity of earbuds: 35mAh*2 Battery capacity of charging case: 450mAh Supported protocols: HSP, HFP, A2DP, AVRCP The surface of retro appearance is sprayed with metallic paint with colorful breathing lights Best transmission distance: <1M Maximum transmission distance: 10M Voice prompt: support Impedance: 16Ω Sensitivity: 100.1dB Horn diameter: 13mm Operating frequency of Bluetooth: 2.402GHz-2.480GHz Frequency response range: 20Hz-20KHz Multi-point connection: unsupported Wearing method: In-ear User manual: Chinese and English Included accessories: USB charging cable, user manual, earplugs of different size