Batteries
$2.00
Needed every 1 month of use
Replacement Headband
$9.95
Needed every 6-12 months of use
External Sensor Wires
$25.00
Needed only in cases where temporalis muscles effectively paralyzed. If you place fingers at temples and clench and feel no muscles fibers move under skin, you may need these.
Replacement Sensor Pads
$9.95
Needed every 2-6 months of use, depending on skin chemistry. See step 8 in Troubleshooting Guide for how to measure whether replacement needed.