Compact and powerful: Built-in 10W speaker with stable transmission up to 10 meters – delivers powerful performance for endless karaoke fun. Versatile fun: Comes with 2 microphones and 7 voice effects including karaoke, original sound, echo, male, female, children's, and magic sound modes. Switch modes easily by pressing and holding the EFF button on the microphone for 3 seconds. Long-lasting playtime: Equipped with a built-in rechargeable 1500 mAh battery that provides 3 to 6 hours of continuous use – perfect for parties, outdoor events, and on-the-go entertainment. Multifunctional playback system: Features Bluetooth 5.0 technology, and supports TF card, USB flash drive, and AUX-In connectivity. Ideal for both indoor use in classrooms, living rooms, and meeting rooms, as well as outdoor use in parks, on beaches, and at gatherings. Ideal gift: A great gift choice for kids, perfect for birthdays, Christmas, Children's Day, and other special occasions – encourages musical expression and fun. Specifications: - Compatible with Apple and Android smartphones - Speaker power: 10W - Signal-to-noise ratio: >85dB - Frequency response: 150Hz–20kHz - Audio input: 3.5mm stereo jack - Microphone battery: 1200mAh - Built-in device battery: 1500mAh - Charging time: 2–3 hours - Playback time: Up to 6 hours - Power adapter: Input 220V, Output 5V, Current 1A/2A