Details Product model - SD-306Bluetooth version - Bluetooth 4.2Wireless transmission distance - 10 metersProduct size - 29.8 * 14 * 15cmSpeaker power - 2 * 10WSpeaker specifications - 3 inches external magneticBattery specification - built-in 18650 / 1800mAh / 7.4VPlaying time - 2-3 hoursCharging method - charger specification 5V-2ACharging time - 1-2HProduct material - ABS plasticPacking size - 31.5 * 15/5 * 20cmMicrophone solution - BK U bandMicrophone transmission distance - 10 metersMicrophone battery specifications - built-in 18650 1500Mah 3.7VMicrophone charging time - 1-2HMicrophone type - unidirectional capacitorSingle machine net weight - 1.9KGMain function - Bluetooth / TF card / AUX / FM / U disk / comes with K song modeProduct color - gold; pink; blackAccessories content - Data cable* 1Audio cable* 1Wireless microphone* 2