The BTR3 is the world’s first portable Hi-Fi Bluetooth amplifier to support all wireless sound formats which allows for receiving high quality music files. The front 2.5D glass and the rounded aluminum alloy frame fit perfectly, which makes for a harmonious integrated whole. The unique Bluetooth audio codec indicator light can flash in different colors when different audio format inputs (eg. when receiving aptX HD audio format, the light will flash yellow) are received. All the buttons are placed at easily accessible locations, which ensures convenient operation. It's easy to carry, hanging from a lanyard or attached via the rear clip.