Item Name B-101 Sky Stone Earbuds Description Active Noise Cancellation (ANC) Environmental Noise Cancellation (ENC) Transparency Mode Quad Mic Low Latency 45ms 8 mm Speaker Driver In-Ear Wearing Deduction Playback Time: upto 6 Hours Touch Sensor Standby Time: 130 Hours Bluetooth Version: BT 5.4 Transmission Range: 12m Case Battery Capacity: 400mAH Headset Battery Capacity: 45mAh Charging Box Charging Time: About 1 hour Charging Box Standby Time: 520 days Charging Box Battery Capacity: 400mAh Charging Input: DC 5V-340mA Main-Secondary Switching 1 Year Brand Warranty