Shenzhen Haoyuanshengda Electronical Co., Ltd.  

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1. With digital high-frequency radio frequency technology: 2.4GHz
2. High resolution 1000DPI/500DPI
3. Batteries: AA alkaline battery x 2
4. Compatible with windows 98/ME/2000 /XP/Vista
5. Connector: Mini USB Receiver, 3keys, 1 scroll wheel.
6. Sleep mode for saving power
7. Freely 360-degree use within 10M radius
8. Colors are available
9. Welcome the OEM
10. Specification: 101.18mm(L)*58.20mm(W)*33.88mm(H)
11. Packed in a paper box with a bliste