ITEM NAME:Dc 5V 7.83Hz Precision Schumann Resonance Ultra-Low Frequency Pulse Wave Ge H7L6 Dc 5V 7.83Hz Precision Schumann Resonance Ultra-Low Frequency Pulse Wave Ge H7L6 Type: Logic ICs.This product is Schumann wave 7.83HZ very low frequency generator, features high accuracy and stability. Frequency: 7.83Hz. Dissipation Power: no. Application: no. Module size: length and width (102 80mm).