"Product details of Outdoor Cell Phone Mobile Phone Signal Enhancement Improve Stickers Camping
100% new and high quality!
This latest research result cellphone antenna signal booster will prevent you from poor signal when travelling, mountaineering, taking the lift.
Huge impact - like having a 4 foot antenna on your cell phone.
Improves Reception, Reduce Static in boats, elevators, cars, buildings, tunnels, and mountains.
Easy to install, simply peel and stick to the inside of your battery compartment."