This color screen lithium battery intelligent phase sequence electric pen has a beautiful appearance and is easy to operate and practical. This non-contact phase sequence detector can enter the phase sequence detection state by pressing the "PHASE" button, which is very convenient. High precision digital phase sequence verification pen is safe and reliable, with double insulation protection. The induction pen has high, medium, and low sensitivity levels, taking into account the range of high, medium, and low levels. Basic Parameters: 1. Display: LCD screen 2. Sampling rate: approximately 3 times per second 3. Automatic shutdown time: 3 minutes 4. Working temperature and humidity: 0-40 ℃, 0-80% RH 5. Storage temperature and humidity: -10-60 ℃, 0-70% RH 6. Power supply: Built in 3.7V 400mA lithium battery 7. Working height: maximum 2000 meters 8. Size: 166x27.55x20mm 9. Weight: 60.2g Color:Black Material:plastic Package Contents: 1 * Digital Voltage Tester Pen 1 * USB Cable 1 * English instruction manual