Check the listing for details. OMRON Electronics CS1W-CLK11 Optical Buss Controller Link Unit . Condition: Used. Listed at 18.89 USD. OMRON Electronics CS1W-CLK11 Optical Buss Controller Link Unit Nelson of All Trades is a USA-based company.30 Day Money Back Guarantee.If returned, item(s) must be in exact condition as when it was shipped to you and must return with original packaging.Perishable items are sold as is, new in open box, within the expiration date. We do not manufacture any of the products that we sell in our eBay store. Our products have no warranty - seller or manufacturer. Everything listed has been purchased at retail stores, liquidations, or come from our own personal collection all with intent to resell. For Industrial equipment, there are no warranties or guarantees - see condition description for details. We test most electronics (power on + function for consumer) unless condition appears new. Industrial equipment receives power testing and minimal function testing - customers are responsible for thorough testing prior to use in production. If for some reason you are unsatisfied, please reach out to us via eBay messages. We will respond promptly to support you!