Listed here is a Inductive Amplifier 200B Tool. The Original Speaker Probe. This is in excellent condition and works as it should. It does take a 9 Volt Battery NEDA Type 1604 (Battery not included). I am asking $20 for it. I ACCEPT CASH ONLY. I do not need help selling this. Serious inquiries only. If this listing is still up, this is still available for purchase. Thank you for your interest in my listing.