Artisan Power P-6423: C-Shape Single Wire Headset for Motorola CLS1410 and CLS1100 Radios: RLN6423, HKLN6423, HKLN4604 Compatible with DTR, RDX, CLS, AX and XTN radio series. Replaces OEM Part Number RLN6423, HKLN6423 & HKLN4604. Swivel wrap around ear piece, single wire with shirt clip with "Push-To-Talk" button. C-Shape Ear Piece 2-Wire Headset for the Motorola CLS1410 and CLS1100. Manufactured by Artisan Power, a leader in high quality replacement products.