Feature:1. MULTI CONNECTIVITY: Pair the karaoke machine with any Bluetooth enabled device or play music from a Memory Card or USB drive. With a stable signal transmission range of 10m / 32.8ft for Android phones, tablets, PCs and other devices.2. FUN SOUND CHANGING: Professional sound processor and tuning system to create KTV live sound environment and wonderful reverb. Available with 4 different effects to change your voice, including Original, Female, Male, Monster.3. POWERFUL SOUND AND LED LIGHT: The small karaoke machine has powerful and clear sound, our speaker will provide you with deep bass and clear treble, featuring dual speakers for a strong stereo effect. LED lights dance with the rhythm of the music for more fun.4. LONG BATTERY LIFE: Portable karaoke machine, speaker with built in 2000mAh rechargeable battery and microphone with built in 500mAh battery ensure 3 to 4 hours of fun. Can be taken anywhere, suitable for birthday parties, outdoor activities, traveling and more.5. GIFT OPTION: You can sing karaoke alone or let your kids, family, friends start their live performance. Can be used as Easter, Christmas, Valentine's Day, Halloween, Thanksgiving, New Year gift and give it to your friends or family.Specification:Item Type: Portable Karaoke MachineMaterial: ABSBuilt in Battery for Speaker: 2000mAh Lithium BatteryBuilt in Battery for Microphone: 500mAh Lithium BatteryOutput Power: 5WFrequency Range: 90Hz-18kHzMemory Card: Supports Up to 64GB (Not Included).Package List:1 x Speaker1 x Microphone1 x Charging Cable1 x User ManualNote:Microphone too close will produce harsh and strange sound, which is more common sound feedback, thus try to keep the microphone away from the speaker.