The ARC T21075QD-PTT One-Wire Surveillance microphone comes with a quick disconnect adapter providing reliable quick release from the two-way radio. The T21 earpiece is durable and easy to conceal and operate. The Knowles brand microphone element delivers superior transmit audio. With Kevlar reinforced cables and a 360 degree rotating clothing clip, the T21 has proven to be a top choice for public safety personnel. Compatible with Motorola APX4000, APX6000, APX6000XE, APX7000, APX7000XE, APX8000, APX1000, APX3000, SRX2200, DP3400, DP3401, DP3600, DP3601, DP4400, DP4600, DP4800, DGP4150, DGP4150+, DGP6150, DGP6150+, XiRP8200, XiRP8208, XiRP8260, XiRP8268, TRBO-XPR6300, XPR6350, XPR6380, XPR6500, PR6550, XPR6580, XPR7300, XPR7350, XPR7500, XPR7550