No battery required.
Easy to measure moisture value of soil, plants, garden, vegetables, trees etc.   Blister packed.

GE3335-01 SOIL pH, Moisture, Sunlight Meter(SPH-3B )
SOIL pH, Moisture, Sunlight Meter
pH Range: 3.5 - 8 pH (3.5-6.5 Acidic, 7-8 Alkaline)
Moisture Range: 1-10 (1-3 Dry; 4-6 Normal; and 7-10 Wet)
Light Range: 0 - 2000 lux (0-200 Low, 200-500 Low+, 500-1000 Normal, and 1000-2000 High)
Size: 2.36"*11"mm
Probe length: 7.1" mm