Losei Bluetooth Headphones, True Wireless Earbuds Deep Bass Mini in Ear Bluetooth Earphones HD Stereo Sound Headset with Charging Case and Built in Mic for Sports Running [Hifi Stereo Sound with Deep Bass] ATS2823B High Quality Bluetooth Chip, Which Eliminate Noise and Echo. DSP-Equipped audio processor, Provide Bass Sound. You will be immersed in Music World Completely. [Charge on the go] equipped with 500 mAh battery charging case, which can provide 3-4 times Full charge for the Wireless earbuds. You can put the charging case into your pocket. No burden and never worry about the battery problem. Perfect for sports, cycling, camping, hiking, driving, jogging & gym exercise, long travelling. [True wireless technology] get rid of the line trouble. Provide faster pairing, stable connection, wireless range up to 33ft if no obstructions. [Ergonomic design] specially design Headphone angle can well match the ear, deep inside the cochlea, preventing the headphones from falling. [After-sales guarantee] One month no reason money-back guarantee and 12 months replacement warranty, If you are not satisfied with your purchase for any reason, please feel free to Contact us at the buyer center or support email, 24 hours quick reply.