Certificate type: RoHS type: Portable Speaker launch time: 2018 connection method: Bluetooth connection interface type: USB frequency response range: 40Hz-20KHz output power: 5W signal-to-noise ratio: 75db power supply method: built-in lithium battery sound channel: 2.1 playback time: 3 hours extended storage: 16GB Bluetooth protocol: 4.1 number of speakers: 1 effective distance: 15m operation method: keys applicable crowd: General shell material: Plastic Support format: TF Card speaker adjustment method: key box material: ABS appearance size: 153 * 75 * 46mm product weight: 0.335 overprint logo: OK processing method: OEM processing fastest shipping time: 1-3 days Article No.: M168 power supply method: USB battery capacity: 800 Ma