Description: VoiceJoy 2.5mm Monaural Telephone Headset is a headset designed for call center. It is Compatible for the most 2.5MM telephones. With flexible goose neck Mic boom, adjustable headband and soft ear pad, users will have comfortable wearing experience. Features / unction characteristics: Hands-free 2.5mm Headset High clear voice communication Compatible for most telephones in call center 150ohms speaker to ensure perfect voice quality Headset head can freely telescopic, moderate elasticity, comfortable to wear Super soft ear cushions make sure comfortable wearing High durability, fully adapt to 7 x 24 hours for high frequency Specification: Color: Black Microphone type: electrical condenser microphone(ECM) Microphone voltage: 2.0v Receiver impedance: 150 ohm Package: 1 * 2.5mm Headset 1 * User manual The 2.5mm plug is for Phones: Cisco Linksys: CIT200, CIT300, CIT310, CIT400 Cisco SPA303, 501G, 502G, 504G, 508G, 509G, 525G 512G 514G,525G Cisco Linksys SPA921, SPA922, SPA941, SPA942, SPA962 models Polycom IP320, IP321, IP330, IP331, SoundPoint Pro SE-220 SE-225 Grandstream GXP-2010, GXP-2020, GXP-2100, GXP-2110, GXP-2120, GXP-280, GXP-285, BT200, BT201 GXP-2000(Version 1.0 higher with 2.5mm Headset Socket) Panasonic KX-NT136, KX-NT343, KX-NT346, KX-NT366 ,KX-T 7603, KX-T 7625, KX-T 7630, KX-T7633, KX-T 7636, KX-T 7730, KX-T 7735 Gigaset C610 IP, C620H Zultys Technologies: ZIP 4x4, ZIP 4x5 IP Phones Plus Many Many Cordless Phones with standard 2.5mm Headset jack.

Built-In Adjustable Volume + Mute Control. Super Durable: Precision design, quality plastics, unibody headband construction, superior quality?microphone makes this call center headset sturdier and more durable. Comfortable To Wear -- made of the flexible metal hose with the positioning accuracy MIC + Structural Design + Durable. Simple to use, no need additional adapter, just connect the headset’s 2.5mm connector to your telephone’s 2.5mm headset jack. Press headset button on the phone’s keypad to use the headset. All phone functions control by the phone keypad can also be used for the headset. Please see the Compatible list in the description.2.5MM TELEPHONE HEADSET: Compatible with Cisco Linksys SPA Polycom Grandstream Panasonic Zultys Siemens Gigaset Uniden AT&T Office IP, most Cordless Dect Phones and some old cell phones with standard 2.5MM HEADSET JACK.