Specifications: The earphone is equipped with 1.42mm drive to deliver stunning sound for an enjoyable listening experience. Built-in large capacity battery which can up to 10-14 hours working time and 300 hours standby time. It works with bluetooth-compatible 5.0 chips to ensure stable and fast connection. IPX5 life waterproof rate can keep the sweat far away. Item Name: Earphone Material:ABS, Metal Bluetooth version: bluetooth-compatible 5.0 Plan: Jerry AC6956A Speaker: Ø14.2mm Impedance: 32±15%Ω(at 1kHz 1mW) Sensitivity: 102dB±3dB Frequency Response: 20Hz- 20kHz Bluetooth Effective Distance: 10 Meters Best Call Distance: 8 Meters Music Time: About 10 Hours Talk Time: About 10 Hours Charging Time: About 2 Hours Battery Capacity: 3.7V/120mAHRechargeable Battery (Included) Features:Magnetic, Neck Hanging, In Ear Line Length: 45.5cm/17.91" (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 Earphone 1 x User Manua