5W 52mm Drum-Type Speaker: Ungraded 5W full range speaker, 360 degree spatial audio, larger volume, more powerful HiFi sound. Sound Card Level DSP Chip: Built-in MVSILICON DSP reverb chip, naturally beautify vocals, easily improve your karaoke performance. Dual-Mic TWS Interconnection: TWS interconnection technology, sing a duet with your family, delivering clearer surround sound. 7 Optional Sound Effects: One-button switch between 7 different sound effects, change to boy/girl voice, more fun for kids. Long-Lasting Battery Life: Large capacity battery with long-lasting battery life, lets you sing for longer. Widely Compatible with Various APPs: Supports phones, tablets, TVs, laptops, and more, compatible with various mainstream APPs. One-Button Mute, Easy to Operate: Easily switch from original soundtrack to accompaniment soundtrack with one button, feel like singing in a KTV anywhere. Highly Sensitive Condenser Mic without Noise: Omnidirectional microphone sponge pop filter, 360 degreeHD sound pick-up, avoids squeaking or noise, protects kid ears. Bluetooth 5.0: Latest anti-interference Bluetooth 5.0, instant connection, faster and more stable transmission without delay or jamming. Bluetooth version: V5.0 Audio decoding: SBC Support protocols: A2DP, AVRCP Transmission range: less than 12m Frequency response range: 50Hz to 12KHz Sounding unit: 52mm Rated power: 5W Music duration: about 4 hours (80% volume) Connection standby time: about 12 hours Battery capacity: 1800mAh Charging duration: approximately 3 hours Charging interface: Type-C Charging input: 5V 1A Music modes: Bluetooth, TF, audio input TF card capacity limit: within 32G(not included) Material: ABS+PC