Wilson 811210 Signal Boost Vehicle Amplifier Supports Cdma, Tdma, Gsm & Amps Up to 3W Max Output Power * Power Control Logic Ensures Maximum Output Power Is Within Cellular Standards * Connects to All Phones & Data Cards with A Universal Connector Using A Removable Adhesive Backed Velcro Patch Single-user improvementgreatly reduces dropped calls & extends cellular signal range Works with all cellular phones & all U.S.-based carriers except iDEN/Nextel Significantly improves cellular phone & data card performance in weak-signal areas Delivers up to 10x more power than standard cellular phones or cellular-based data cards to a single user Includes ultra-slim antenna that attaches to phone or data card