DON ONE - TWSA130 BLACK - True Wireless Earbuds ANC ENC ANC/ENC TWS True Wireless Stereo earbuds ENC (Environmental Noise Cancellation) ANC (Anti Noise Cancellation) Rechargeable lithium battery built-inCharge earbuds inside charging case LED light charging 4 indicators Specifications: Bluetooth:                                          V5.2 +EDR  TWS (True Wireless Stereo) Lithium battery inside case:                 500mAh/3.7V Lithium battery inside earphones:         2 x 50mAh/3.7V Power input:                                       USB C  5V/1A (max) Range:                                               Up to 10 meters (depending on obstructions and interference) Talking/music playtime:                       Up to 4 hours (depending on volume level) Standby time:                                     Up to 7-10 days Charging time:                                    About 1 hour Frequency for Bluetooth:                     2.4GHz Noise red