Smart electronic card Bluetooth audio speaker

Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 450MA Frequency response range: 100HZ-20KHZ Output power: 3 ohm 4W Signal to noise ratio: ≥75dB Power supply: built-in lithium battery Channel: 2.1 Playing time: 6 hours Expansion storage: 32GB Bluetooth protocol: 4.1 Number of speakers: 2 Effective distance: 15 meters Function: card, waterproof, radio, dustproof, drop-proof, voice prompt, call function Operation mode: button Applicable people: general Product model: SC208 wireless bluetooth speaker Product specifications: 20*6.4*4cm Packing size: 22*7.2*4.6cm Product net weight/gross weight: 265g/310g Product color: black, red, blue, green, orange, silver Official standard: one SC 208 speaker, one charging cable Main body material: ABS plastic, oil injection, iron mesh, silicone pad Bluetooth version: RSA4.0 Bluetooth name: BT-SPEAKER Blu