Riversong Air Pro TWS Earphone (EA79) Experience the comfort and a well balanced sound-stage. Easy compatibility with Smartphones, Tablets and Laptops. Can support lighting charging and wireless charging two modes. Product Details Brand: Riversong Model: EA79 Speaker size: 13mm Charging case capacity: 180mAh Frequency: 20Hz-20KHz Playback: 3.5h Charging port: Lightning Dimension: ?5.06 x 7.36 x 2.58 cm Weight: 40 g Warranty: Manufacturer warranty Note: Color depends only on stock availability