Motorola HKLN4604A Lightweight Swivel Earpiece W/ PTT Microphone New 

Former Part #RLN6423 Earpiece Flexible Swivel Earpiece also known as the  HKLN4604 

Provides all-day comfort and wear. Designed for retail. Small, lightweight and durable. Adjustable for ease of use. Its in-line push-to-talk feature makes communication easy when your radio is not readily accessible. 

The RLN6423 is compatible with the following Motorola Two Way Radios: 

• Motorola CLS Series: CLS1110, CLS1410 
• Motorola RDX Series: RDU2020, RDU2080d, RDU4100, RDU4160d, RDV2020, RDV2080d, RDV5100, RDM2020, RDM2080D 
• Motorola RM Series: RMM2080, RMU2040, RMU2080, RMU2080D, RMV2080, RMM2050
• Motorola DTR Series: DTR410, DTR550, DTR650, DTR700
• Motorola DLR Series: DLR1020, DLR1060
• Motorola AX Series: AXU4100, AXV5100 
• Motorola XTN Series: XU1100, XU2100, XU2600, XV1100, XV2100, XV2600
• Motorola M Series: MU22CV, MU22CVS, MV11C, MV24CVS, MV24CVST, VL50, CP110, SP10, SP21, CP125, SP50 

MOTOROLA PART UPDATE - RLN6423A is now HKLN4604A