ITEM NAME:7.83Hz Schumann Resonance Ultra-Low Frequency Pulse Generator & Power Bank E5D4 7.83Hz Schumann Resonance Ultra-Low Frequency Pulse Generator & Power Bank E5D4 Dimensions (length * width * height): 75 * 75 * 23 (mm) Weight: 210 grams First, the scope of use: 1. People with sleep disorders. 2, 9000mA battery, the maximum support 2A charging. Fourth, the use of precautions: 1. When the battery power is lower than 5%, it will turn off the display and cause the display to be abnormal or not displayed. Press the button again to start the machine. 2. When using the charging treasure function to charge the mobile phone, it is recommended to disconnect the external charger and use the charger to be easily damaged. 3, when not used for a long time, it is recommended to charge at least once a month to maintain the battery's activity. Colour: Black Material: plastic + metal Second, the function overview: 1, Schumann wave generator, can be set to normally open / off, 1-12 hours timing. 2. Count the battery capacity using the coulomb chip. Third, the use of: 1. Click the button, the digital tube displays the percentage of battery usage, and automatically turns off the display after 10 seconds. 2. Double-click the button to enter the Schumann wave setting within 1 second. Click the button to set the mode: - - → Always open 00 → Close 01-12 → Open for 1-12 hours, then close. 3. When the battery capacity is lower than 15%, the digital tube flashes. When it is lower than 10%, the Shuman wave generator is automatically turned off. When it is lower than 5%, it will automatically shut down. 4. When the battery is just charging, the digital tube will not be lit in time. Instead, it is necessary to check that the battery capacity is increased, and the digital tube always displays the battery percentage. Package Contents: 1 x Ultra-low frequency pulse generator 1 x USB cable