Three built-in tones 1490531 14905311 Auto-off feature preserves battery life Separate talk battery for increased voltage and power for test sets Modular jack allows multiple cord sets to be used for different applications View Instruction Sheet Free shipping in the continental US! Availability: Usually ships the next business day. 1490531-1$51.60 FREE shipping within the continental U.S. (select UPS Ground at checkout) Expedite shipping provided at an additional cost Can't find the tooling that you are looking for? Email Tyco Electronics for a quick follow up