Wireless Bluetooth Speaker Aluminum Alloy U Disk Computer Subwoofer Mini Bluetooth Audio Small Steel Cannon TF Card Built-in Lithium Battery

Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 350mah Frequency response range: 100HZ-20KHZ Output power: 3W Signal to noise ratio: ≥75dB Power supply: built-in lithium battery Channel: 1 Playing time: 1h Extended storage: 32GB Bluetooth protocol: 4.0 Number of speakers: 1 Effective distance: 10 meters Mode of operation: Button Applicable people: General Display: None Play format: MP3 Shell material: metal Whether to support APP: No Support format: TF card Speaker adjustment method: Button Is there a radio function: Yes Box material: metal Appearance size: 45 * 65mm Product weight: 0.2 (KG) Print LOGO: Yes Processing method: Customized drawing