Echo Wall Bluetooth Speaker Wireless Card

Type: Bluetooth speaker
Connection method: 3.5MM audio jack
Interface type: card reader
Output power: 5W*4
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: 550*50*50mm