Used - Like New: lowest price
$2.98+ $3.85 Shipping
- Get it by Friday, Aug 30 from Florissant, Missouri
- • New – Open box condition
- • No returns, but backed by eBay Money back guarantee
The basic timing of the M-980 is designed to permit operation with almost any progress tone system. Covers the 315 to 640 Hz range (common call progress). Billing systems. Dynamic range over 36 dB. 40 ms minimum detect (50 ms to output).