【Wireless iWatch Charger】Built-in magnetic charging module for all iWatch. You can charge your iWatch without removing the watches original charger from the docking station. Recharge the charger with a Micro USB Cable. 【Portable Powerbank】The built in 900 mAh lithium ion battery can charge your iWatch anytime, anywhere. Great for charging your watch for long day, on the go or 3D2N camp. Fully charge your iWatch 1~2 times. 【Wide Compatibility】Perfect compatible with all iWatch, such as 2018 newest iWatch, iWatch Series 1, 2 , 3 , 4, 5, Nike Hermès Edition.As long as you have one 42mm/ 38mm Size iWatch,it will work. 【Apple MFi Certified】This Wireless iWatch Charger is MFi certified. Also your watch is protected from over-current, over-charging and over-heating. 【Key Chain Design】Rather than taking your long magnetic charger or oversized dock with you, simply bring this keychain wireless i Watch charger. Hook it to your backpack or carry it in your bag or pocket.Fit well with other keys if you have it on the keychain.