The PTM-8668L is available on Motorola intercom models: XPR3000,XPR7000, Dp2600, XIR-P6600,GP328D, GP3338D LKP, DGP 8050,DGP 5050, DEP 550, APX2000,APX4000,DP4400, DP4801，APX2000，SRX2200, XPR7000E
