Feature:1. Builtin 2pcs 15 W speakers with multifunction, can achieve a full range of stereo reproduction.2. It makes the subwoofer stronger and more balanced, and the Voice Cancel feature lets you cancel the voice with a single press.3. Builtin Bluetooth 4.2. Plug in a USB/small memory card and record audio through a microphone.4. Karaoke machine can convert sound field effects into standard, pop music, rock music, classical music, treble, subwoofer, and share with family and friends.5. The speakers have builtin rechargeable 7.4V/2000mAh highcapacity lithiumion batteries and 3.7V/1500mAh highcapacity lithiumion batteries, which provide up to 3.5 hours of continuous music playback at maximum volume. The speaker acts as a charging station, so it can be easily recharged at the same time.Specification:Item Type: Bluetooth SpeakerMaterial: ABSColor: As Pictures Shown Weight: Approx. 2542g/89.7ozBluetooth: 4.2 Bluetooth Name: SDRDFrequency response: 100Hz-18KHzPower charger: 5V/2ABattery capacity: 7.4V/3000mAhPower output: 15W+15WFrequency: 100 Hz - 18 KHZDrive unit: 2 x 4INS/N: 80dBMicrophone battery specification: 1500mAh 3.7VMicrophone charging time :1-2 hoursMicrophone type: single point capacityMode: Bluetooth /Small Memory Card/USB/AUX/ Karaok.Package List:1 xKaraoke Machine 2 x Microphone1 x Charging Cable1 x Audio Cable1 x Manual Note: