Polycom Black Box Resale Services SpectraLink 8440 Handset,Black 2200-37150-001 Talk Time: up to 12hrs Standby Time: up to 120hrs Bands: 802.11a/b/g/n Connections: Bluetooth, micro-USB, 2.5mm jack, Screen: 2.2in., 240 x 320 res. Durability Standards: MIL STD 810F, IP64, QoS: yes