inputs.text: says tin - bought two ham radio repeater building simple use exactly says doprosyou access inside unit rehemoving screws inside circut board fairly simple access itehem breaks stops working easy access sodder fix know fix circut boardsthe unit works side well without issue ran unit 5 days continuously without issuesconsthe built fan not seehem hooked anything unit not bad thing not use power supply 247 mine radio box secondary fan unit stays rather coolfor price fantastic value well worth money however get impression looking inside unit extended duty may wear unit faster well known brands