Specifications Bluetooth Version: 5.0 Bluetooth Working Range: 10m/33ft Battery Capacity: 3.7V 50mAh *2 Backup Battery Capacity: 400mAh Impedance: 32Ω Distortion: 1% Frequency: 20-20,000HZ Talk/Play Time: ≥3.5 hours Standby Time: 120 hours Earphone Weight: 4.3g * 2 Charging Dock Weight: 29g Charging Dock Size: 9.3 * 3.6 * 3cm Package User manuel * 1 POPCHOSE earphones * 1 pair USB cable * 1 pc S & M earbude * 2 pairs Charging dock * 1 pc FAQs What should I do if I receive a pair of defective earbuds? We provide a 12-month warranty for this product. You may contact us to get a refund/replacement (Please read the last page of the User Guide to find out how to contact us). Our customer service representatives will respond to your requests at the very first time. Why cannot the left and right earbuds connect with each other? The two earbuds will connect with each other automatically if you took them out of the charging box at the same time. If they don't, please follow these tips to reconnect them. 1. Put them in the charging box and take them out at the same time again. 2. If step 1 doesn't work, please double click the earbuds at the same time until the blue and red lights flash alternately, then the two earpieces will connect with each other. 3. If both of the above steps don't work, please contact our customer service.