NE555 Pulse Generator Square Wave Frequency Adjustable Duty Cycle Mini Signal GeneratorFeature:1. Main chip: NE5552. Power: input voltage: 4.5V-12VDC. 5V power supply、 the output current can be around 12V; 10-15MA power supply、 the output current can be around 30-35MA;3. Dutycycle adjustable range: 0.4-0.994. Frequency: 5 frequency bands (measured value)J1 file: 0.6Hz ~ 25HzJ2 file: 7Hz ~ 300HzJ3 file: 50Hz ~ 2.5kHzJ4 block: 350kHz ~ 6.6kHzJ5 block: 6.7kHz ~ 180kHz5. Input current: 100MA6. Output voltage: 4.2V--11.4V peak value (with supply voltage variation)7. With LED output indicatorPackage includes:1 x NE555 module