We provide various kinds of flip up calculators. If you are interested in them, please contact us!

Grand Promise Development Co., Ltd. was established in 2001, by investing of electronics items, gift items and promotional items.

We are a leading electronic products manufacturer and worldwide exporter. Having own assembly factories, moulding factories, PCB factory and injection factories, we are confident to provide excellent and competitive sales services and on time delivery. Our Products are well-accepted in South-East Asia, USA and Europe.