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Hi - The VTech IS8151-5 has the option to adjust the listening volume on the handset or telephone base while on a call. To adjust the listening volume of a handset: • Press ▼ VOLUME ▲ on the handset while on a call. To adjust the listening volume of the telephone base: • Press + VOL - on the telephone base while on a call. Hope this information helps. Thank You! - VTech Support
Sorry, there was a problem. Please try again later.Yes, using the center dial
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