100% GUARANTEE! All Mellbree products come with 12 months warranty, you are protected with our 100% No Questions Asked Guarantee for either a replacement or refund. FLEXIBILITY & DURABILITY: Provides you fancy texture and extreme durability. Multiple layers of shielding minimize interference, corrosion-resistant and optimal signal clarity, effectively prolong the cable service life. COMPATIBILITY MODELS: Compatible with Fairywill FW-917 SG-508 FW-508 FW-507 FW508 FW507 D1 D3 D7 D8 E6 E10 E11 P11 Plus Pro 2001 Kids TB-508 TB-507. COMPATIBILITY: Mellbree USB charger is designed specifically for the Fairywill sonic toothbrush. EASY TO CARRY: Without bulky AC plug, Mellbree charger for Fairywill Toothbrush can be easily put into backpacks and suitcases, very suitable for travel.