Features: 1.Main Function: These signal stickers for mobile phones can solve the problem of bad signals during elevators or climbing, effectively improve reception and reduce static electricity in ships, elevators, cars, buildings, tunnels and mountains. 2.Back Adhesive Design: Our phone signal enhancement stickers adopt back adhesive design, and you can easily remove and apply it on the phone. 3.Lightweight: Mobile phone signal sticker is small and light, which reduces the burden on the mobile phone and is easy to carry. 4.5PCS: The shipment includes five phone signal stickers that are practical and they are perfect small gift for your friends and family. 5.Widely Applicable: These boosters are not only used for cell phones but also boost the reception on two way radios, walkie talkies, beepers, and even cordless phones in your house specification:Item Type: Phone Signal Stickers Material:? PCB Gross Weight: 10g/0.35oz Color: Black gold Function: 1. Improved mobile phone signal, applicable to smart devices such as mobile phones 2. Applicable to ships, elevators, cars, buildings, tunnels, mountains and other locations PackageList:5 x Phone Signal Stickers 5 x Manual