Portable Pill Bluetooth Audio $ 12.16 Connection method: Bluetooth connection Interface type: USB Frequency response range: 100HZ-20KHZ Signal to noise ratio: 75dB Power supply mode: built-in lithium battery Channel: 2 Playing time: 6 hours Expansion storage: 32GB Bluetooth protocol: 2.1 Number of speakers: 2 Effective distance: 7 meters Function: insert card, radio, dustproof, voice prompt Operation mode: button Applicable people: general Display: None Play format: MP3 Shell material: plastic
