Size: 86.1 x 37x 15.7mm Capacity: 2ml Coil Resistance: 0.7ohm-3.0ohm Battery: Built-in 950mAh Charging Specification: 5V 1A Low Voltage Warning: 3.3V±0.1V PCBA Temperature alarm: 80 Maximum output duration: 10s Working temperature: -10-45 Stand-by current: Less than 10uA Battery Life Indicator: Red light: 0-30%; Blue light: 31-69%; Green light: 70-100%