Dual-Range Moving Coil DC Voltmeter, 0-5V / 0-15V Material_Mesh Bull frog dissection model with

Bull frog dissection model with open back reveals vertebral column

Single B22 bayonet lamp holder on a hard plastic base with two 4mm banana terminals

providing a quick swap-in reference for general-purpose AC-circuit and timing-experiment work

knock sensor

letting students rearrange bars to convert between series and parallel topologies on the same set of lamps

Dual-Range Moving Coil DC Voltmeter, 0-5V / 0-15V Material_Mesh Bull frog dissection model withDual range 0 5V and 0 15V moving coil DC voltmeter at plus or minus 2. 5% accuracy with an inclined face, letting students read both small cell and battery stack voltages on a single instrument.