... system ,save your labor cost ,increase the satisfaction of cleint . Y-310B/433 guest calling systemOur wireless calling system is widely ... used in Restaurants ,Hosptial ,Cafes , Internet Cafés ,Food Courts ,Hotels & Resorts ,Golf Driving Range ,Beauty Saloons ,Skin ... sensitivity:≤116db Working Frequency:433MHzDimension:420mm x 152mm x 40mm Y-310B/433 guest calling system