Protective case for headphone amplifier BTR3. Made of a specially selected fall resistant silicone, it is soft but not easily deformable. Provides reliable protection. Not only does it provide effective protection for the BTR3 and 2.5D aluminum alloy body from any possible scratches, it also prevents perspiration from entering the device during exercise. Forget sticky fingerprints. With a silicone coating that acts as an intrusive touch, it does not attract streaks easily. Sold in different colors. Each set comes in 6 colors - red, blue, yellow, green, black and white, giving your BTR3 a new face every day.