Model Number: KJ-980 Key Specifications/Special Features: This amplifier is specifically designed for telephone use with extremely low battery consumptionIt is professionally engineered with automatic power-saving function when it is not in useIt combines high technical quality with ease of useBattery life: more than 4 monthsEasy compatibilityAdjustment with 4-pin slide switchConnecting a single-line or multiple line phoneMute control and indicatorVolume control Main Export Markets: Asia

North America