Three-in-one water quality test pen EC meter conductivity meter TDS test pen

1. Solid metal button, after rigorous testing of 100,000 hits, it is not easy to press the button 

2. Our batteries are made of high-capacity environmentally-friendly electronics, with long life and large capacity. Under normal circumstances, our electronics can be used for 1-2 years. 

 3. Our battery card is soldered on the circuit board, there will be no bad contact, free power off, etc.