COOK'S POLE CLIMBING NU-213

New compact improved model built in solid state buzzer and simulator to provide electrical shock of 400 V 0.2 mA at a frequency of 5 per second for a duration controlled manually on by built in 30 sec. timer output available for recording on kymograph or polygraph. To work on 220/230 Volt AC Supply. For study of pole jump (Avoidance)