Handmade items to support play for children with disabilities. These can be used to operate battery-powered toys with a special needs switch. Set of 2 for size AA or AAA batteries. [How to Use] * Clamp the insulation part (round metal part) onto the battery and connect the jack to the 3.5mm monaural plug of the special needs switch. * Turn ON the original switch on the toy. * The toy will operate when the special needs switch is turned ON. * The timing of the toy's operation varies depending on the type of switch. * For example, there are momentary switches (ON while pressed, OFF when released) and alternate switches (ON when pressed, locks, OFF when pressed again to unlock). * These cannot be used with toys that activate with stimuli such as sound, vibration, tilt, or light, or with toys that have a parallel circuit (most are serial circuits) for the batteries. [Specifications] * 3.5mm mini-jack * Length: Approximately 20cm * Insulation part: Φ10mm for AA or AAA batteries [Important Notes] * Even commercially available products are very fragile and can be disconnected if inserted/removed frequently from the battery box or pulled forcefully. * Some toys may not be able to accommodate the BD adapter, or may require modifications for the cord to pass through. * When clamping to the negative side of the battery, some batteries have a concave center compared to the edge. In this case, a gap will form between the adapter and the battery, and electricity will not flow. * When clamping to the positive side of the battery, a gap may form between the battery and the adapter depending on the shape of the battery box, and electricity will not flow. * If the BD adapter is disconnected, it can be repaired by soldering. * The edges of the copper plate are as smooth as possible, but since it is thin metal, please be careful not to injure the skin. Especially, make sure that children do not touch it. [Price and Shipping] * Shipped via Rakuraku or Yuuyu Mercari service. * Price is not negotiable.