Rui Cheng Technology supply wireless pager, pager site, construction elevator pager, wireless pager is composed by the master and the extension, the extension is to host the receiving end of the transmission side, the extension button when pressed, the host will be able to receive the signal. Brand: Golden emblem of Product Model: JHD-DT Product Specifications: 107 * 58 * 35mm Material: ABS Color: White Battery: 9V battery emission current: 18mA Standby current: 800 m buttons: one million times waterproof rating: IPX5 Features Description : 1, fully sealed design, waterproof; 2, solid structure, anti-knock drop resistance; 3, with fixing screw holes, easy installation and suitable for industrial use Scope: Construction site workshop.