Tripp Lite 4ft Lightning Coiled Charge Cable Black (M100004COILBK) SAS8087S450 Yealink T4U series uses SIP

Yealink T4U series uses SIP over Transport Layer Security (TLS/SSL)

Number of outlets: 6 joules of surge protection: 945 J lines: 1

10GBASE-SW

so no separate cable is needed to connect devices online

Tripp Lite 4ft Lightning Coiled Charge Cable Black (M100004COILBK) SAS8087S450 Yealink T4U series uses SIPUSB A to Lightning cable connects your latest generation iPhone, iPad or iPod to the USB A port on your USB charger, laptop or desktop computer so you can charge your Apple device and transfer data at the same time. 4' cable is specially coiled to take up much less space than a normal cable and has an effective length of 2' to 3' when in use. It also resists tangles and knots to conveniently store it in your car or carry it in your purse, backpack or