Same features as H31, but with noise-cancelling microphone that reduces background noise you transmit to your callers.

Unit comes with a QD connector and connects to phones as follows:

• For single or multi-line corded phones without built-in headset jack, purchase the PLA-M12 adaptor (see Accessories below)
• For Nortel corded phones only with built-in headset jack, purchase the P-version of this headset
• For phones with a dual-prong ACD adaptor, purchase PLA-P10 adaptor (see below)
• For corded phones with a built-in 2.5mm headset jack, purchase the PLA-43038-01 adaptor cable (see below)
• Use with digital spread spectrum cordless phones may result in unsatisfactory sound quality -- connect at your own risk. The only H-series headset approved for DSS cordless use is the PLA-H51NS

---