This is a USB data blocker. It is made of aluminum alloy material, durable to use. Physically removed data prevent any kinds of data transfer or sync so that you can charge your device safely with it in public places.Data are physically removed from the USB port, cannot transfer data with this adapter.You can charge your device safely in public places.It is suitable for phone, tablet, MP3, and etc.Adopt premium aluminum alloy material for durable use.Suitable for hotel, airport, cafe, office, and etc.Colour:black/redMaterial:Aluminum alloySize:41.7 x 17.35 x 7.48mmPackage Contents:4 x USB Data BlockerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.

4Pcs USB Data Blocker,USB Data Theft Defender Only For Quick Charge, Protect Against Juice Jacking, Refuse Hacking 

This is a USB data blocker. It is made of aluminum alloy material, durable to use. Physically removed data prevent any kinds of data transfer or sync so that you can charge your device safely with it in public places.Data are physically removed from the USB port, cannot transfer data with this adapter.You can charge your device safely in public places.It is suitable for phone, tablet, MP3, and etc.Adopt premium aluminum alloy material for durable use.Suitable for hotel, airport, cafe, office, and etc.Colour:black/redMaterial:Aluminum alloySize:41.7 x 17.35 x 7.48mmPackage Contents:4 x USB Data BlockerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.