Host Profile: portable communications acoustic energy intercom phone KTH-IS Details: KTH-IS portable communications acoustic energy intercom Product Description KTH-IS portable communications acoustic energy intercom phone, handheld handle it by telephone, intercom phone power communication box, headset telephone, communication lines. Suitable for mining tunnel disaster areas, underground air defense facilities, underground shopping malls warehouses, caves, tunnels, while Bay mountain canyons, electromagnetic waves can not transmit regional sites and other places. Products meet MT289-92, MT211-1990 electro-acoustic, electrical properties, and have GB3836.1-2010 and GB3836.4-2010 standard of proof, the product is mine intrinsically safe, explosion-proof mark, Exibl. Multi-station relay with continuous communication function (multi-station distance calls ≥2km). The main technical parameters: Operating temperature: -20 ℃ ~ + 40 ℃ Distortion: ≤10% Operating frequency: 300Hz ~ 3000Hz alarm frequency: 1000Hz ± 200Hz intrinsically safe parameters Operating voltage: 7.4V Operating Current: ≤50mA open circuit voltage: 8.4V Short circuit current: ≤3.5A Power Communication Box: Voltage DC7.4V Capacity: 1200mAh Life: Rechargeable 500 consecutive use of time:> 16 hours of other products provided by the company: Complete laboratory equipment, complete sets of laboratory equipment, analytical instruments, medical equipment (a class), chemicals (non-toxic), power electronic measuring instruments, environmental measuring instruments, agricultural equipment, testing instruments, laboratory equipment, mining, security, fire and other instruments, domestic and imported instrumentation products. Committed to serving the environmental, power communications, food, health and epidemic prevention, animal epidemic prevention and quarantine, pharmaceutical, chemical, scientific experiment, school teaching, agriculture, automotive and other industries and major manufacturers, government agencies and other units required for a variety of instruments and the needs of peripheral products and offers large procurement service center is a science and technology enterprises. Welcome to inquire:? 0871-64313808 18987277208 Mr. He more instruments: www.yndgyq.com