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The battery with a protection circuit provides over-voltage
1 x Test module Water
Provide both digital and analog output
Note:SD Card not included
3x 18650 3
Hex Key / Allen key / Allen Wrench satin The battery with a protectionA hex key (also, Allen key and Allen wrench) is a simple driver for screws that have heads with internal hexagonal recesses (sockets). Hex keys are formed from a single piece of hard steel hexagonal rod having blunt ends that fit snugly into similarly shaped screw sockets. The rods are bent to 90, forming two arms of unequal length resembling an "L". The tool is usually held and twisted by its long arm, creating a relatively large torque at the tip of
US$ 10.00
US$ 11.00
US$ 89.95
