Avaya TransTalk 9040 Wireless Telephone 3204-09B  Single zone mobility radius of up to 900 ft. covers up to 500,000 square feet. Full access to all your lines. Put calls on hold, transfer, redial, etc...See incoming caller ID. Set up conference calls. Check messages. Access up to 10 lines. 4 Line LCD back-lit display. Quick battery charge: Full charge in 1.5 hours. 3.5 Hours talk time / 22 Hours standby time. Message waiting indicator / Vibrator alert on handset. Built in jack for headset.