On site lock boxes with temporary codes

[Mark Bradford]

I thought I have searched BP right but I can't seem to find any discussion about Keyboxes. I've been thinking about putting a keybox at each property for the use of locked out tenants and service workers. I was thinking I would want one to be satellite controlled so I can set temporary codes for the Contractors. I would also like to use this idea at a future vacation rental. Any one use a system like this? I have also searched Google but not really finding anything other than door keypads with one code options.