Works on any analog or digital cell phone, including PCS, GSM and tri-band phones.

Works great on Nokia, Ericsson, Sony, Nextel, NEC, Motorola, Qualcomm, Kyocera, Sprint, Sanyo, Samsung, Audiovox, and Mitsubishi cell phones.

It increases the signal strength of any digital or analog cell phone that has a space for this in the battery compartment beneath the battery.

It also reduces static to provide better voice clarity.

Incredibly easy to install! No tools are required for the installation of this simple device.