Product Features: : 1. Bluetooth speaker function, three playback modes: Bluetooth, line in, TF card 2. Microphone function: After Bluetooth connection, open the singing APP and sing your song anytime, anywhere. It can be used for conference hosting, friends gathering, stage performance 3. Ear return function, can be linked to external high-power equipment to amplify the sound effect.Treble and bass effect adjustment function, to debug the effect you want 4. High-quality materials, oxidized color, display.Battery 2000mAh, playback to 5 hours 5. Dual speaker design, high-quality sound quality brings customers super enjoyment.Support one-key cancellation of sound, easily switch between singing and pure accompaniment Description Product name: BT microphone Pickup: Condenser Output power: 8w Loudspeaker: 52mm 4Ω/ 8w Frequency response: 100Hz-18KHz Support mode: BT/Line in BT: 5.0+ Charging Voltage: 5V/1A Signal-to-Noise Ratio: ≥80dB Operation frequency: 2.402G-2.480GHz Battery capacity: 2000mAh/3.7v interconnection: support interconnected duet singing, listen to songs to enjoy stereo sound effects, and easily enjoy the time of double chorus Material: plastic colour: black Package Contents: 1 x Wireless Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.