Function: small lantern certificate type: RoHS type: Bluetooth speaker launch time: 2018 connection method: Bluetooth connection interface type: USB frequency response range: 40Hz-20KHz output power: 5W signal-to-noise ratio: 70dB power supply method: built-in lithium battery sound channel: 2.1 playback time: 6 hours extended storage: 32GB Bluetooth protocol: 4.1 number of speakers: 2 effective distance: 10M operation method: keys applicable population: General Display screen: none shell material: Plastic support format: USB flash disk speaker adjustment method: key box material: ABS appearance size: 175 * 70 * 70mm product weight: 402 overprint logo: OK processing method: OEM processing fastest shipping time: 1-3 days Logistics Service: door-to-door delivery after sales service: shop three guarantees Article Number: M118 power supply method: USB battery capacity: 1200