Working voltage: 2.7V-4.2V< br> Working mode: the microphone is started< br> Starting negative pressure: - 100Pa~- 300Pa< br> Power-on: the power-on LED flashes for three times, and then enters the sleep mode without smoking after 2 seconds< br> Static current: ≤ 8uA< br> Resistance value of adaptive atomizer: 1.0 Ω - 2.0 Ω< br> Output voltage: (no-load) constant RMS output 3.6V; (loaded 1.0 Ω) constant RMS output 3.5V< br>