Magnetic earbuds IPX4 waterproof Extremely lightweight Enjoy sports without mobile device Share local music with friends & lovers in perfect harmony Built-in MP3 player use without BT, save power & extend battery life Bluetooth Version: V5.0 Frequency range: 2.402－2.480GHZ Playtime: 8~10hrs approx Support MP3,WMA,APE,FLAC,WAV Support TF Card up to 128GB Charging Port: Type-C Rechargeable Battery: 3.7V 200mAh