This is a Logi Bolt compatible USB receiver made by Logicool (Logitech). It can be used to connect mice and keyboards. ■ Condition ・Unused (New condition, never taken out of the box) ■ Compatible Models (example) MX Master 3 / 3S MX Keys / MX Keys Mini ERGO K860 etc. ※Please make sure your device is "Logi Bolt compatible". It is not Unifying compatible. ■ Note ・This receiver is exclusively for Logi Bolt compatible models. It is not compatible with the conventional Unifying (orange mark). ・Software such as Logi Options+ may be required for pairing with the device. For those looking for a Logi Bolt receiver, for spares, replacements when lost, or for a second computer, etc.!