Usage Tips:Compatible with Norelco 7000 or 5000 or 3000 Series,QT series, QS series, AT series, PT series, QG series, BG series, HQ series, RQ series, XL series, XLCC series, X series, HS series, QC series,Grooming Kit Bodygroom, BeardTrimmer, Beard, SensoTouch, Precision, Spectra and Sensotec, SmartTouch XL Speed XL, Quadra, Cool Skin, generation Cool Skin, Style Shaver, PowerTouch,Suker Hair Clipper, Arcitec Compatible with Norelco HQ8505,3000 3100 3500 4100 4200 4500 5000 5100 5200 5500 5600 5700 6100 7000 7100 7200 7300 7400 7500 7600 7700 8000X 8500X 8900 9300 9700 Series Shavers,Fit most Norelco Aquatec, Arcitec and Multigroom Shavers, Razors and Trimmers. Compatible part numbers HQ8505 AT810 or 41 AT830 BT5210 or 42 BT7215 or 49 PT724 or 41 PT730 or 41 QG3364 or 42 QG3330 QG3330 or 60 QT4018 or 49 S9311 or 84 S7370 or 84 S9721 or 84 YS524 or 41 HQ-8505 7-piece set: 6 charging heads of different shapes are suitable for various electric clipper interfaces, DC 5V USB to 5.5x2.1mm Charging Cable x1 Built in pure copper conductor, strong conductivity, faster and more stable transmission. Outer layer is wrapped with PVC environmental protection materials, which is safe, environmental friendly and durable Note: Please check your product interface size before purchasing