Product Name: Lenovo One-Key Service Mouse 2.4G Wireless/Lenovo One-Key Service Mouse Bluetooth Product weight: about 91g Item model number: M25 Main material: ABS Wireless connection: 2.4G/Bluetooth link (there are 2 options for this product link) Working distance: < 10m Product size: 117.19*58.72*41.01(mm) Working mode: photoelectric sensor