Extremely comfortable classic acoustic tube style earpiece, only that its been upgraded from the inside out. We swapped the old PVC tube for a poly-urethane that is much more elastic/stretchy than its predecessor. If you're running a shift-based operation, you're in for a treat. You can easily connect and disconnect the PU acoustic tube that 1 set of earpiece may be able switch for use with different individuals and still remain sanitary (purchase the extra acoustic tube separately). Simple to use with a 1-wire, in-line style operation. We tried to make the earpiece more comfortable by making it lighter, however, our durability doesn't comprise.

• Upgraded version with extremely flexible PU acoustic tube and abilityEarpiece-AC-5035 to easily connect/disconnect
• Simplistic single wire in-line operations for multi-purpose function
• Lightweight, flexibility provides comfort and enhances day-to-day experience
• Designed with the idea to become better at battery efficiency
• Achieved exceptional microphone sensitivity of -42 ±3dB and 116dB for speaker

KGP Series: KPG27D, KPG29D, KPG48D, KPG49,KPG55D, KPG56D, KPG62D, KPG66D, KPG69D, KPG70D , KPG74D, KPG75D, KPG77D,KPG82D, KPG87D

TH Series: TH-F6,TH-F6A,TH-D,TH-D7A,TH-D7AG,TH-D7E,TH-D72A,TH-F,TH-F7E,TH-G71,TH-G71A,TH-G71E,TH-K2,TH-K2A,TH-K2E,TH-K2ET,TH-K20A,TH-21,TH-21AT,TH-21BT,TH-22,TH-22A,TH-22AT,TH-22E,TH-25,TH-26,TH-27,TH-28,TH-31AT,TH-31BT,TH-41,TH-41AT,TH-41BT,TH-42,TH-42A,TH-42AT,TH-2E,TH-45,TH-46,TH-47,TH-48,TH-55,TH-75,TH-77,TH-215,TH-225,TH-235,TH-235A,TH-235E,TH-315,TH-415

TK Series:TK-208,TK-220,TK-240,TK-240D,TK-248,TK-250,TK-260,TK-270,TK-308,TK-320,TK-340,TK-340D,TK-348,TK-350,TK-353,TK-360,TK-370G,TK-372G,TK-373G,TK-378,TK-378G,TK-430,TK-431,TK-2100,TK-2102,TK-2130,TK-2160,TK-2170,TK-2312,TK-2360,TK-2400,TK-2400V,TK-2400VP,TK-2402,TK-2402V,TK-3100,TK-3101,TK-3102,TK-3107,TK-3118,TK-3130,TK-3131,TK-3160,TK-3170,TK-3173,TK-3230XLS,TK-3312,TK-3360,TK-3400,TK-3400U,TK-3400UP,TK-3402,TK-3402U

NX Series:NX-220,NX-240V,NX-320,NX-340U,NX-420