Function: plug in card certificate type: RoHS type: Portable Speaker launch time: 2019 connection method: Bluetooth connection interface type: USB frequency response range: 100Hz-20KHz output power: 5W signal-to-noise ratio: 75db power supply method: built-in lithium battery sound channel: 2 playback time: 6 hours extended storage: 32GB Bluetooth protocol: 4.1 number of speakers: 2 effective distance: 10M operation method: keys applicable crowd: General display Display screen: none shell material: Plastic support format: TF Card speaker adjustment method: key box material: ABS appearance size: 200 * 85 * 90mm product weight: 0.56 printed logo: OK processing method: OEM processing fastest shipping time: 1-3 days Article No.: yx-011 power mode: USB battery capacity: 1500