Supervoice SVC-QD304 headset QD to RJ9 Bottom Cable
QD to Single 4Pins 3.5mm Jack Bottom Cable
SVC-QD301 Compatibility list:
Grandstream Cordless IP Phones:
DP720, DP722 & DP730 IP Dect Cordless Phones
WP810, WP820 Portable WiFi Phones
Mobile phones:
iPhone, Samgsung, Nokia, Blackberry, HTC and MI, ViVO,
Huawei Yealink IP DECT Phone:
W56P