Bluetooth Remote control. The FiiO RM1 is a perfect accessory to add to your FiiO collection. This works with not only FiiO Bluetooth enabled devices (X7) but also with other Bluetooth enabled devices that have Bluetooth 3.0 and above. This will control your music from the player if it is stand-alone or if the player is docked on the K5. This will work from up to 10 meters away. It is made of lightweight aluminum and plastics, which make it, transit it naturally in colour and make it look delicate in appearance. Color: Black. Features: Can be used with the FiiO X7 and K5 dock to control music easily - Can be used with other android enabled devices (BT 3.0 and above required) - Can be used to control music out and about in your car - Has a 10 meter distance.