Philips SHS3200WT/37 Flexible Earhook Headphones White Powerful bass thanks to an acoustically-tuned air Channel. Connectivity Technology: Wired 15 mm speaker driver 3D flexible ear hook ensures secure fit in all ear sizes Stays comfortably in your ear when you are on the move Extremely durable Philips Flexible Earhook Headphones SHS3201/28 White (replaces SHS3201/37) Bass pipe emphasizes low tones for a clear, realistic sound Enjoy best-in-class performance and optimum sound quality 15mm speaker driver optimizes wearing comfort 3D flexible earhook ensures secure fit in all ear sizes Ergonomically-shaped headphone enhances user comfort Contoured earhook increase wearing comfort and stability A 1.2m long cable that is ideal for outdoor use Stays comfortably in your ear when you are on the move Extremely durable construction