The bluetooth earphones has 9D surround sound design, which can make you fully feel the charm of music. With large battery capacity, the bluetooth earphones can last for a whole day. Made of ABS, PC, electroplate and silicone, it is durable and lightweight. The length of charging case is 5.5cm, width is 5.3cm, and thickness is 3cm. It is suitable for music, home, office, gifts, exercising. Item Name: bluetooth-compatible Earphone Material:Silicone,ABS,PC,Electroplate Charging Time: 60 Minutes Output Power: 30mW Frequency Range: 20-20000Hz Impedance: 32 OHM Operating Voltage Range: 3.0V-4.2V Working Frequency: 2.4GHz Bluetooth Version: bluetooth-compatible v5.2+EDR Bluetooth Distance: 18m MIC Sensitivity: -42dB Music Time: 3-4 Hours Talk Time: 3-4 Hours Standby Time: 96 Hours Charging Compartment Battery Capacity: 500MAH Earphone Battery Capacity: 45MAH Driver Units: 15mm Size:12cmx8.5cmx3.5cm/4.72inx3.35inx1.38in 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 Pair of Earphones 1 X Charging Cable 1 X User Manual