Echo Wall Bluetooth Speaker Wireless Card $ 21.90 Type: Bluetooth speaker Connection method: 3.5MM audio jack Interface type: card reader Output power: 5W4 Signal to noise ratio: 75dB Power supply mode: built-in lithium battery Channel: 2 Playing time: 8 hours Expansion storage: 32GB Bluetooth protocol: 4.0 Number of speakers: 2 Effective distance: 15 meters Function: insert card, radio, voice prompt, call function Operation mode: button Applicable people: general Display: None Play format: MP3, WMA Shell material: metal Speaker adjustment method Button Is there a radio function: None Box material: metal Appearance size: 55050*50mm
