Compared to other similar products on the market, the true wireless earbud is designed with Bluetooth-compatible 5.1 chip and intelligent noise reduction, so it provides a more stable and fast connection while delivering sound much clearer. Unlike other similar products, this wireless earphone is equipped with a back clip type charging case, which can be easily clipped to clothes. This product has wide compatibility, which can work with various kinds of devices. You have no need to worry about compatibility issues. It is constructed of ABS material. After pairing for the first time, simply remove the earphones from the charging case and the earphones will automatically connect with your phone. The length of the charging case is 5.5cm, the width is 2.1cm and the height is 2.8cm. This product is perfectly suitable for home, household, dorm, office, school, etc. Item Name: Wireless Earphone Material: ABS Bluetooth-compatible Version: 5.1 Communication Distance: 10 Meters Charging Voltage: DC 5V Working Voltage: 3.7V Battery Capacity: Earphones: 30mAh Charging Case: 50mAh Charging Time: 40 minutes Listening Time: 5 hours Talking Time: 3 hours Size Details: Charging Case 5.5cm x 2.1cm x 2.8cm/2.17" x 0.83" x 1.1" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Wireless Earphone 1 x User Manual