"Speaker Master" this APP can connect the mobile phone with the Quran Devices via Bluetooth.It can control the Quran Devices via mobile phone within a certain range,such as turn on or off the Devices,select reicters or translations,control the light of Devices,set timed shutdown and so on.Using this APP to control the Quran Devices more easily.It is accessory part(remote control) for the Quran Devices.