Armband for iPod nano 3rd generation (fits with a connected Nike Sport Kit Receiver) bundled with Sensor Case for Nike + iPod Sport Kit Sensor (does not include actual sensor) Armband specifically designed to fit 3G nano with a connected Nike Plus iPod Sport Kit receiver Sensor case securely attaches to shoe laces to hold Nike + iPod Sport Kit Sensor Armband holds nano 3G right side up or upside down so screen reads right side up when viewed on arm Armband has clear, protective window cover with full navigational control Armband flap securely stores and manages earphone cord; Adjusts to fit arms 8" to 16" and an Armband Extender is available for larger arm sizes (see EX3)