Usage Tips:Feature 1[Easy to Install] Adopt back adhesive design, you can easily remove the improved signal sticker and apply it on the phone. 2[Small and Lightweight] Improved mobile phone signal sticker is small and light, which reduces the burden on the mobile phone and is easy to carry. 3[Large Quantity] One pack includes 5 pieces of telephone signal improvement stickers, which is enough to meet your needs for heavy use and long term use. 4[Widely Application] Booster sticker is not only used in mobile phones, but also can improve the reception of walkie talkies, buzzers and even cordless phones at home through PDA two way radio. 5[Signal Enhancement Function] Improved signal stickers for mobile phones can solve the problem of bad signals during elevators or climbing, which can effectively improve reception and reduce static electricity in ships, elevators, cars, buildings, tunnels and mountains.SpecificationItem Type: Phone SignalBoosterStickerColor: Black GoldMaterial: PCBWeight: Approx.10g/0.4ozParameters: Improved Mobile Phone Signal, Suitable for Smart Devices Such As Mobile PhonesSuitable: for Ships, Elevators, Cars, Buildings, Tunnels, Mountains and Other Locations .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List5 x Phone SignalBoosterSticker5 x Manual