Features:100% high qualityAutomatic shutdown: automatically shut down after 10 minutesReasonable design: the pen electrode can be directly inserted into in the drinking water bottleFast test: due to the exquisite type sensors, 2-6 seconds to finish a testEasy cleaning: the electrode sheath can be drawn, easy to clean the probe and jacket.Titanium alloy material reduces the magnetic disturbance in the water!With leather case, portable, small and light weight, easy to carryWide testing range 0~9990PPMWide application temperature: working in 0~50℃LCD screen, long battery lifeReasonable design: the electrode can immerse into the aqueous solution directly the protective cap can be regard as a container of aqueous solution!High accuracy and auto temperature compensationOperation:1. Remove the protective cap2. Press the ON/OFF button once out of the water. The tester will read”000”3. Immerse the tester into the water no more than 2 inches4. Wait for the display to stabilize. The tester automatically compensates for temperatures variations. Once the readout stabilizes (10-30seconds), press the HOLD button to view out of the water5. Press the ON/OFF button again to turn off the tester. The tester will shut off automatically after 10mins of non-use6. After usage, shake off the water form your tester or wipe it with a tissue.7. NOTE: if the tester display a flashing “X10” icon, multiply the reading by 10IMPORTANT: DO NOT drop the entire tester in the water or dip beyond the maximum 2″level. This product is not waterproof. Tester is not meant to be used in hot water!Product properties:Brand:no Display Type: DigitalModel: TDS-2BDIY Supplies: PlumbingWith Backlight Or Not: NoOperating Temperature: 0℃~50℃TDS Range: 0-9990PPMAccuracy: ±2% full scaleAuto shut-off : 10minutesSize: Approx.14.2*2.3*1.3cmNet Weight: 44gSpecifications:Calibration: factory calibratedTemperature Compensation: AutomaticPower Source: 2X 1.5V button cellMaterial: Titanium alloyColor: BluePackage Included:1 * TDS-2B Meter1* Leather CaseNote: Due to lighting effect, monitor\'s brightness etc, there could be some slight differences in the colour between the photo and the actual item, Hope you can understand.