Product information : 
 Product model: C7002 
 Number of keys: 4 keys 
 Working distance: 10M 
 Material used: ABS 
 Product weight: 70g 
 Product size: 112x57x22mm 
 Product Features: Ergonomics 
 Button service life: 5 million times 
 Battery type: built-in 500 mAh battery 
Connection method: Bluetooth connection / 2.4GHz wireless connection