KWC-1 (Kramer Wireless Charging) is a built-in table mounted charging spot that enables you to charge your mobile device by simply placing it on the charging spot. If your mobile device does not feature wireless charging, you can connect it to o…ne of the receivers included in the package and then place it on the charging spot. Note that additional receivers can be purchased separately. Elegant in-Table Solution Easy to Install – Drill a hole 4.17″ to 4.25″ (106 to 108mm) in tables less than 3″ (76mm) thick. Qi Standard Compliant Product Features:Built-in table mounted charging spotAudio – N/A