1[Bluetooth Module]Built in Bluetooth module, can be used as a speaker, player and recorder, compatible with various singing applications. 2[Multifunction Buttons]Multifunction buttons, easily switch between different models, adjust the volume, sing and play music. 3[High Compatibility]Support up to 32GB storage card (not included) and song switching. 10m / 33ft barrier free transmission. 4[Rechargeable]2000mAh rechargeable multi protection lithium battery to ensure longer singing time. Faster charging and longer battery life. 5[Comfortable Design]The excellent design fits your hand perfectly. Surrounding sound effects reverberation brings surround immersion. Item Type: Wireless Microphone Material: ABS Model: K6L Function: Bluetooth microphone, loudspeaker Scope of Application: Smart devices with Bluetooth Pickup: Moving Coil Reverberation Mode: Surrounding sound effects reverberation Bluetooth Version: V5.0 Memory Card Playback Format: MP3, WMA, WAV Transmission Distance: 10m / 33ft (without obstacles) Talking Distance: 1m / 3.3ft Working Frequency: 2.402G-2.480GHz Transmitting Power: 4dB Receiving Sensitivity: -85dB Signal to Noise Ratio: 80dB Distortion: 1%-2% Output Power: 5W+5W Speaker Specification: 40mm 4 Frequency Response Range: 30Hz-20KHz Microphone Built in Battery: Polymer lithium battery 2000mAh (included) Receiver Built in Battery: Polymer lithium battery 300mAh (included) Charging Time: About 4 hours Playing Time: About 5-6 hours 1 x Microphone 1 x Receiver 1 x Manual 1 x Charging Cable 1 x 3.5mm to for Android Interface Cable