Feature:1. PROGRAMMABLE FREQUENCY GENERATION: The Schumann Wave Generator produces accurate and stable frequencies using a programmable generator.2. MULTIPLE POWER SETTINGS: With 3 power levels, the low frequency pulse generator allows for adjustment according to individual preferences, with a maximum peak output power of 5W.3. MINIMAL HARMONIC DISTORTION: Unlike similar products on the market, our Schumann wave generator uses fewer harmonics, resulting in a purer sine wave output.4. LED POWER INDICATOR: The built in LED indicator displays power levels, with low, medium, and high settings represented by L, M, and H respectively.5. LONG BATTERY LIFE WITH USB CHARGING: Equipped with a built in 3.7V 4000mAH lithium polymer battery, the pulse generator offers extended standby time and can last up to 8 hours of continuous maximum power operation. It also supports USB charging and comes with a type c charging cable.Specification:Item Type: Schumann Wave GeneratorMaterial: ABSRated Current: 0.5APeak Power: 5WSignal Waveform: Pure sine wavePower Indicator: Adjustable in three gears (L, M, H)Battery: 3.7V 4000mAH polymer lithium battery x 1 (shipped with built in battery)Battery Life: Maximum power continuous operation up to 8 hours.Package List:1 x Schumann Wave Generator1 x Type C Cable