FEATURES AND FACILITIES DRY CELL and 12V Car Battery Operation. MICROPHONE with On/Off switch and detachable. PROVISION for connecting an AUX source such as a Cassette Player for playing recorded messagaes. POWERFUL Amplification and Excellent Intelligibility. ABS Moulded Body, Sturdy Yet Lightweight. SHOULDER strap for easy-to-carry-around. PROVISION for connecting extra speaker for loud and distributed sound. SOUND Clear, Long Range and Efficient Design. TECHNICAL SPECIFICATIONS POWER OUTPUT 20Watts Rated 22 Watts Max. VOICE RANGE approx. 600 m (1.2Km at quiet area) POWER SOURCE   12V DC Car Battery, 8 x UM-1 Dry Cells BATTERY LIFE 8-10 hrs. MICROPHONE Anti-howling Dynamic DIMENSIONS 150Wx145Dx460H WEIGHT   3.0 kg (2.5 kg without cells)