1111MicrosoftInternetExplorer402DocumentNotSpecified7 8 磅Normal0Specification Type Board Only With Shell optional Board Only Working voltage DC 5V DC 4 15V Working current 8 14MAPower interface micro USBDefault frequency 7 83HzAdjustment range 0 01Hz 100000Hz pure sine waveSignal voltage amplitude 3VPCB board size 150 100 12MM With Shell Working voltage DC 5V DC 4 15V Working current 9 14mAPower interface micro USBDefault frequency 7 83HzAdjustment range 0 01Hz 100000Hz pure sine waveSignal voltage amplitude 3VHas 3 5MM audio output interfaceWith acrylic housingSize 155 105 26MM with shell Feature 1 This product is made of high quality materials the use of low temperature drift crystal oscillator and high precision DAC special chip the product has good frequency stability 2 This product can not only output 7 83Hz Schuman wave but also add programmable frequency modulation technology can adjust the frequency in the range of 0 01Hz 100000Hz 3 2 kinds of specifications there are 2 kinds without shell and with shell can be selected according to demand 4 Digital circuit crystal frequency benchmark more stable stronger anti interference Product Description Schuman wave itself is not directly acting on sound or video products to improve the sound quality but the role of the space environment so that people s body and mind can be relaxed improve the body s perception of sound and images improve the health of the human body work efficiency relieve