With the iTape Bluetooth Box Adapter, your box player instantly becomes a Bluetooth wireless box player; Supports Bluetooth (all smartphones, tablets, etc.); Use the built-in microphone and car speakers to enable hands-free calls; The Bluetooth Box Adapter can be charged during work; No need to worry about power; Supports 8GB Micro SD TF card, you can save your favorite songs in the TF card (Note: TF card is not included); Control volume and up and down songs +/- buttons for easy operation; Power status: (1) Most mobile phones can display the power status of the iTape Bluetooth Box Adapter (for example: all iPhones, some Android phones, etc.); (2): The Bluetooth Box Adapter will disconnect from the Bluetooth connection within 10 minutes after it is turned off. (3); Charging voltage: DC: 5V.