Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

This is a set of useful tester for liquid in daily life，including a TDS Meter Tester and a Digital pH meter.Digital pen style pH meter is an ideal instrument for aquarium， fishing industry， swimming pool，school laboratory， food?&?beverage etc.Very excellent， accurate and durable.Digital TDS Meter Tester， for testing the Filter Water Quality Purity， checking the performance of your water filter， check for hardness (1grain=17ppm)， make sure you always drink pure water!pH Meter Features:1.Measuring pH Range: 0.0- 14.0pH2.Resolution: 0.1 pH3.Accuracy: ±0.1 pH(20°C)， ±0.2pH4.Operating Temperature: 0-50°C (32-122°F)5.Calibration: Manual，1 point6.Item Net Weight: Approx. 57g (after installed batteries)7.Dimensions: 152 x 29 x 20mm (5.984 x 1.142 x 0.591 inch)Digital TDS Meter Tester Features :1.This item can be used in : water purifiers and filters， food (vegetable， fruits) & drink quality monitoring， pools and spas， aquariums， hydroponics.2.Hold function : Saves measurements for convenient reading and recording3.Auto-off function : Turns off meter after 10 minutes of non-use to conserve batteries4.Dual Range : Measures form 0-999ppm， with a resolution of 1ppm. From 1，000 to 9，990ppm， the resolution is 10ppm， indicated by drinking x 10image， Factory calibratedSpecifications :1.Color : Beige2.Accuracy : +/-2% 3.Weight : 68g4..Rang :0-9990ppm5.Item size :155mm x 28mm x 15mm6.Battery : 2 x 1.5V Button Cell battery (included)Note :Do not drop the entire TDS meter in water of dip beyond the maximum immersion level.This unit is not water-tight and is not covered under the warranty if water enters the unit.Package Includes :1 x TDS Meter Tester2 x 1.5V Button Cell battery1 x TDS Meter Tester User Manual1 x Digital pH meter1 x Calibration Adjustment Screwdriver3 x Batteries Included in pH Meter1 x Digital pH meter user instruction (English)