CONTROL MOST HOME APPLIANCES: TV/DVD player / Set-Top-Box / air conditioner/projector/light/fan etc.(26-49 ft distance allowance);ANTI DUST PLUG: keep your 3.5 mm earphone jack of your device from dust and water;NO NEED TO CHARGE: uses the power of your phone or tablet, requires no external battery;ROTARY SWITCH: easy to turn on/turn off, with anti-lost key ring together, it will be easier to find and keep;APP SUPPORT: compatible with all devices of iOS 7.0 above