In order to move the cattle, the cattle prod voltage must be not less than 8KV, better not less than 10KV,  because the cattle is big, the cattle won’t response to the low impulse voltage, so the impulse voltage must be strong enough to the cattle.

The model of this cattle prod is A330, the cattle prod voltage is over 8000V, output current is less than 5mA/s, so it is safe to the cattle. please see the following:

The available length: 22″(56cm) , 32″(84cm), 36″(92cm),42″(107cm),52″(132cm)
The available handle color: dark green, black and red.