Handmade items to support play for children with disabilities. These items allow battery-operated toys to be controlled with a special needs switch. Set of 2: one for single D/C batteries and one for single AA/AAA batteries. 【How to Use】 * Insert the insulated part (round metal part) between the battery and the toy's battery contact, and connect the jack to the 3.5mm mono plug of the special needs switch. * Turn ON the original switch on the toy. * Turning ON the special needs switch will activate the toy. * The timing of the toy's activation 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, locked, and OFF when pressed again to unlock). * These adapters cannot be used with toys that are activated by stimuli such as sound, vibration, tilt, or light, or with toys that use parallel circuits (most use series circuits) for their batteries. 【Specifications】 * 3.5mm mini jack * Cord length: approx. 20cm * Insulated part: Φ13mm for single D/C batteries, Φ10mm for single AA/AAA batteries 【Important Notes】 * Even commercially available products are very fragile and can be easily disconnected if frequently inserted and removed from the battery box or if pulled forcefully. * Depending on the toy, the BD adapter may not fit, or modifications may be required for the cord to pass through. * When inserting on the negative side of the battery, some batteries have a concave center compared to the edge. In this case, there may be a gap between the adapter and the battery, preventing electrical conduction. * When inserting on the positive side of the battery, depending on the shape of the battery box, there may be a gap between the battery and the adapter, preventing electrical conduction. * If the BD adapter is disconnected, it can be repaired by soldering. * The edges of the copper plate are made as smooth as possible, but since it is thin metal, please be careful not to injure the skin. Especially, please make sure that children do not touch it. 【Price and Shipping】 * Shipped via Rakuraku or Yuuyu. * Price reductions are not available.