2 to 5 business days
MP3 version: Built-in 8G memory card, support local MP3 playback function, support single loop & sequence playback, support Bluetooth wireless function, support call function (only valid when Bluetooth is connected to mobile phone), support wired music playback; 2. CSR version: CSR imported chip, support Bluetooth wireless function, support call function (only valid when Bluetooth is connected to the phone), support wired music playback;