XPulser DEEP Sleep AME Tuner – Designed and manufactured in the USA, combines a unique DEEP sleep enhancing 3 Hz magnetic field (PEMF) signal and a matching clicking sound in a portable 9V USB rechargeable battery-operated device which can run continuously (throughout the night) off the battery or USB Cable. Coils can be inserted in the accompanying 2 pocket pouch to be placed inside the pillow cover.