Type: signal enhancement Huge impacts - like having a 4 foot antenna on your cell phone. Easy to install, simply peel and stick to the inside of your battery compartment. Weight: 18g Improves reception, reduce static in boats, elevators, cars, buildings, tunnels, and mountains. Model: 12 Style Eliminate dropped calls. Works on any analog, digital, and tri-band phones. Package Includes: 1 PC signal enhancement