Features:Full choice pocket pH tester, including general, flat and spear sensor for wide application1. With Suitcase and supply in full sets;2. Replaceable sensor;3. LCD with 3 colors of warning settings;Blue for measuring mode, green for calibration and red back-lit for alarm mode;4. Stable reading indication and auto-reading look mode;5. Self-diagnosis;6. Low-powered consumption with 400 hours operation time.7. Water-proof rating: IP 67If you have any question, please contact us. We staff will respond you within 24 hours.Note: Please select the product you need based on product attributes. Please check the model number carefully before ordering. Thank you for your understanding.We are committed to providing good quality services, if you have any needs, welcome to consult，we will do our best to meet 。