This headset comes with microphone amplification function. Why you should need it?

Phones of brands Aastra Shoretel NEC Toshiba Inter-tel Mitel Digium are special which need amplification on headset microphone. Otherwise, headset microphone couldn't work, or the other end caller will complain your voice too soft.

This headset is compatible with following IP Phones of RJ9 headset port, laptops and cell phones with 3.5mm headset port like iPhone, Blackberry, Samsung and most other Android mobiles. (Including but not limited)

Mitel: 5000, 5001, 5005, 5010, 5020, 5021, 5040, 5055, 5140, 5201, 5205, 5207, 5210, 5212, 5215, 5220, 5224, 5230, 5234, 5235, 5240, 5250, 5304, 5310, 5312, 5320, 5324, 5330, 5340, 5360, 5540, 5550, 8520, 8528, 8560, 8568, 8600, Superconsole 1000, Superconsole 2000

Inter-Tel: 8520, 8560, 8600, 8620, 8622, 8662, 8690, ECX 1000, 2000

Aastra: 4222, 4223, 4424, 4225ip, 4422ip, 5446ip, 6735i, 6737i, 6739i, 9112i, 9116, 9133i, 9143i, 9216, 9316CW, 9417CW, 9480i, 9480i CT, 9617, Dialog 5446, i2004, 2002，6730i, 6731i, 6753i, 6755i, 6757i, 6757i CT, 53i, 55i, 57i, 470, 480i, 480e, 2465, 2564, M2216 (ACD I or ACD II), M3905, M4000, M4020, M7208, M7308, M7310, M7316, M7324, M7900, M8001, M8003, M9009, M9516

ShoreTel (Mitel): IP100, IP212K, IP230, IP230G, IP265, IP530, IP560, IP560G, IP565G, 565, 565G, IP655

Toshiba: DP5018-S, DP5022-SD, DP5023-SD, DP5032-SD, DP5122-SD, DP5131-SDL, DP5132-SD, DP5130, DPSX22-SD, DPSX32-SD, IP5022-SD, IP5122-SD, IP5131-SDL, IP5132-SD, IP5522-SD, IP5622-SDESI 40D. ESI 40, ESI 55, ESI 60D, 60 IP, ESI 48-Key IP Feature, 48-Key Digital Feature

Allworx: 9112, 9204, 9212, 9222 Verge IP 9308, 9312

Altigen: AT-500, AT-510, IP-600, IP-705, IP-710, IP-720, IP-8058x8 (Packet8) 6753i, 6755i, 6757i, 2118ST

Obihai 1032, 1062

Adtran IP335, IP430, IP450, IP550, IP560, IP650, IP670, VVX series, IP706, IP712