Specifications:For this model, our normally stock is 2.4G wireless version, also can customize Bluetooth for client.Model number: BT-987Color: Any color for OEM orderMaterial: ABSSize: 11.3(L)x5.88(W)x3.65(H)cmWeight: 60gInterface : BluetoothDPI: 1200Battery: 2xAAA battery(shipping without)Tracking method: OpticalNumbers of button: 3 buttonsWorking range: 10mKey life: 3,000,000Hand orientation: Both handsStock: No, Accept OEMApplication: Desktop/Laptop/Android tv box, ect.OEM service: YESPackage and Delivery:One USB receiver and one wireless mouse in one white color box or a crystal box; 50pcs small packing box in one cartonShip via DHL/FEDEX/UPS/EMS/TNE, ect,small order ship out within 1-3 working days after deposit;mass order ship out within 3-7 working days after deposit;OEM order ship out within 7-15 working days after deposit(depend on)Cautions:Operation distance is closely related to the environment. Battery life may be different for personal habit of using mouse. In case of mouse failure, please check battery power and replace it as necessary. Themouse will shut off automatically and enter sleeping mode for saving power when it's not used for a long time; to wake it up, press the right or left button.