WYZworks HMM-K068-BLUTOOTH-SPKMICPH Bluetooth Wireless Speaker Handheld Microphone for Karaoke Singing compatible with Apple iPhone Android Smartphone Cellphones, Gold Echo reverberation - powerful echo effect, adjustable echo Ideal for all vocal applications from singing to speech and usable as Bluetooth speakers Great for sound recording or processing music and any other audio application Multipurpose: Bluetooth speaker, Karaoke singing, Car Stereo, instrument recording, interviews Compatible with Apple iPhones and Android smartphones