TE-4101C23 Cell Phone Antenna Signal Booster Repeater Amplifier 800MHz and Antenna Works with CDMA 800MHz ; Free outdoor antenna Up to 2000 square meters working range depending on the signal availability Frequency range: Uplink: 824 - 849 MHz ; Downlink: 869 - 894 MHz Designed for easy installation and simple to use Greatly reduces dropped calls, extends signal range, and increases data rates