Brand Unbranded/Generic
ASIN B073XM1J59
Color Yellow
Material ABS
Range -1999mV ~ 1999mV
Resolution 1mV
Accuracy ±5mV 
Operating Temperature  0℃ ~ 50℃ (32°F ~ 122°F)
Battery 2 × 3V(CR1632) Button Cell Battery (not included)
Item Size 14.8 * 2.6 * 1.4cm / 5.8 * 1.0 * 0.6in
Item Weight 37.4g / 1.3oz

Check the listing for details. Pen-type ORP Redox Meter Water Quality Tester Tool ±1999mV Hydroponics Spas T4A0. Color: Yellow, Condition: New. Listed at 26.60 USD. : -1999mV ~ 1999mV. Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems. Accuracy: ±5mV. Item Size: 14.8 2.6 1.4cm / 5.8 1.0 0.6in. Color: Yellow. Item Weight: 37.4g / 1.3oz.

$18.62
$26.60