Multifunction 4 in 1 TDS/EC/PH/TEMP Meter. Water Quality Tester. Specifications: Range: PH 0.00-14.00ph, EC 1~19999 s/cm, TDS 1~19999ppm, Temp 0-60 /23~140 . Resolution: PH 0.01ph EC 1 s/cm TDS 1ppm. Accuracy: PH 0.05ph EC 2% TDS 2%. Calibration: 6.86 4.00 9.18 automatic calibration. Battery: 3*1.5V ( around 320h, auto-off after 5 min). Temperature: 0~60 32.0~140 . Dimension: 183mm*37mm *37mm. Weight: 90g . New! the ph/EC/TDS/Temp is an economically priced, reliable meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Also Used: ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc. Auto-off function, data-hold function and low-battery indicator. Includes a cap, batteries, pH 4.0 buffer, pH 6.86 buffer, pH 9.18 buffer powder . Large and easy-to-read LCD screen. The next generation for today's tech-savvy and health-conscience consumer.