Application BC-3B beacon siren specially designed forconstruction machinery(traveling cranes, crawler crane, rubber tyred gantry crane), port machinery( gantry cranes, bridge cranes) etc hoist devise for visible & audible warning. Major functions and features • Visible & audible warning. • Multiple alarm tones for selection. • Visible alarm light uses long lifetime LED. • Nice appearance, ease of use. • Can connect to external junction box. Specification Installation and operation • Make sure the supply voltage whether can match the rated voltage. • Mount to the mounting surface with M8 screws; make sure the mounting surface has enough strength to hold it. • The speaker mouth upside down, at least the central axis of the speaker must parallel to the horizontal plane, in order to prevent rainwater resides at the horn. • Connect "reserved cable" to the power cable. • Turn on the power supply to activate this device. Notice • The part of material of products is PC( like lamp cover and lamp shell ), so it cannot direct or indirect touch the organic solvent, such as industrial alcohol, banana oil, isopropyl alcohol, carbon tetrachloride, cyclohexanone and so on, otherwise, the product will be corroision. • Please read this manual before using this product. • Don' t connect polarity reversed. • Any questions in operation please contact us. • The horn mouth can' t be face up. Application Supply voltage Shanghai Nanhua Electronics Co., Ltd Tel:+86 021-39126868 Fax:+86 02i-39i26868ext 808/818 Web : E-mail : 1755Wenbei Rd, Jiading district Shanghai 201802 All rights reserved by Nanhua, without the written authorization of the Nanhua, any part thereof shall not be reproduced or transmitted in any