This new 3-in-1 water quality is professional and necessary tool for testing pH / Temperature / EC of solution level. Suitable for aquarium pool soil-free growing laboratory and environment water. Features: Widely used to measure pH / Temperature / EC (Electric Conductivity) of solution & water. Imported IC and high cost performance electrode probe can be replaced. Test temperature in ℃ / ℉(switchable unit) and can online for a long time. Easy calibration of EC with just a -screwdriver and automatic temperature compensation. Test EC with both wide (ms/cm) and narrow (/cm) at will. Chip pH can automatically identify calibration fluid for pH automatic calibration function. Clear LCD with backlight 3 results displayed simultaneously. Easy to use and provide instant display of results. Apply in water sources soil-free growing aquarium hydroponics laboratory spas swimming pools and other water systems. CE FCC & RoHS certificated to offer safer more environmentally friendly and preciser measurement. Specifications: Color: Blue Material: ABS Type: pH/EC-2981 Plug Type: / (Optional) EC Unit: ms/cm /cm (Switchable) Input Voltage: 230～240V () / 110～120V () : pH: 0.00 ～ 14.00pH Temperature: 0℃ ～ 50℃ (32℉ ～ 122℉) EC: 0.00 ～ 19.99ms/cm (0 ～ 2000us/cm) Resolution: pH: 0.01pH Temperature:0.1℃(0.2℉) EC: 0.01ms/cm (1us/cm) Accuracy: pH: ±0.1pH Temperature: ±1℃(±2℉) EC: ±2%F.S Temperature Compensation: 0℃ ～ 50℃ (32℉ ～ 122℉) Working Temperature: 0℃ ～ 50℃ (32℉ ～ 122℉) Supply: 6V Item Size: Approx. 130 * 76 * 26mm / 5.1 * 3.0 * 1.0in (Excluding EC Probe) Item Weight: Approx. 138g / 4.9oz (3 in 1 Meter Body) Package Size: Approx. 25 * 18 * 7cm / 9.8 * 7.1 * 2.8in Package Weight: Approx. 487g / 17.2oz Package List: 1 * 3 in 1 Water Quality with EC Electrode 1 * User Manual 1 * pH Electrode 1 * Temperature Electrode 1 * AC- Adapter 2 * Suction Cups 1 * Bracket 1 * Screwdriver