KX-TG7741C model. 4 handhelds plus the base makes for 5 receivers with Link-to-Cell. Can be paired by bluetooth up to 2 different cellphones (in addition to landline). You can set up a different ring tone for each phone (home, cell1, cell2) and can call out using either. Purchased from Costco a few years ago when we got rid of our landline, but after getting a new phone in the summer I never bothered re-pairing it and 6 months later realized I didn't miss it/don't use it. I always have my phone on me and everybody in the house has their own cellphone. Batteries still good, everything works (I've had to replace batteries on an older set). Phone book and call list cleared, pin reset to 1111.