Solar panel: 5.5V/80mA (charge 600mA in 8 hours)
Built-in battery: 18650*1 cell 1200mAh Voltage: 3.7V
Power consumption: 0.01W (during operation),100mA consumed in 24 hours
Vibration frequency: 400-1000Hz
Shaking time: Shaking for 4 seconds, shaking again at 30 second intervals
Working principle: built-in buzzer (sound wave),motor vibration and ground resonance to play a role