This GPS signal blocker guides against GPS satellite positioning and tracking effectively to protect your information and whereabouts. Large power enables this GPS jammer to cover a large range. It not interference other digital devices when working. Mini size and light weight easy to be carried to everywhere. Different batches, product appearance and color may be different, does not affect the use Type:Portable GPS Signal Blocker color:Blue Material:Metal Package Contents: 1 x Signal Blocker 1 x USB Cable Only 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.