I have a NExT and I use the LF side to get in my room which has a METechs MID300 door handle. I use the HF side to share stuff like my website or a vcard (contact card that iphone and android accepts). The METechs MID300 has a plastic cover over the antenna which is too thick to read the NExT so I had to remove it, reposition the antenna, and then cover the open area with a thin sticker. This is fun for indoors but would not be useful outside. Check the compatibility matrix for other door handles. I think I remember seeing a better one but it was kinda pricey
