car gps signal interference blocker shield protection privacy positioning tracking stalking for auto vehicles

voltage: 12v-24v frequency range: 1560-1580mhz operation frequency bandwidth: 20hz product size: about 8.6 x 2 x 2.1cm/3.4 x 0.8 x 0.8in antenna length: about 6.8cm/2.7in buyers may return the item(s) for a refund if they are not as described or with quality issues within 7 days from the day the item(s) were received.the buyer is required to afford the returning delivery cost, based on the condition of the item(s) received.