With 2.4G wireless and Bluetooth technology, it provides fast transmission speed and stable connection The speaker is compatible with Bluetooth-enabled devices The speaker supports Bluetooth/TF card music playback and headphone output functions (TF card not included) Built-in 1200mAh rechargeable battery, the speaker ensures uninterrupted fun The microphone supporting reverberation sound effect function can make your singing more charming The LED light bright colors can turn any room into a dazzling stage to enhance your overall karaoke experience, and creating a romantic party atmosphere An ideal gift choice for girls, boys, teens and adults in birthdays, all kinds of holidays Specification: Speaker: Power: 6W Working voltage: 3.7V Frequency range: 2402~2480MHz Reverb: 20Hz-20kHz Speaker battery: built-in 18650 battery, 1200mAh Charging time: about 4 hours Bluetooth name: Y1 Microphone: Pickup: condenser microphone Working voltage: 3.7V Frequency range: 20Hz-20kHz Battery: built-in 14500 battery, 500mAh (2pcs is 1000mAh) Charging time: 2 hours Package included: 1 x Portable Speaker 2 x Microphones 1 x Cable 1 x English and Chinese User Instruction Other things not included