Disclaimer: 1. Please do not keep the bluetooth device close to the 2.4Ghz receiver. 2. A wireless transmitter can generate electromagnetic signal, a pacemaker body related aulixiliary instrument please use in caution. 3. Rough interface and reflective medium will affect the performance of the mouse. 4. Do not try to disassemble the device. 5. Long-term when not in use, please remove the battery or take the switch to off states. 6. Please use the soft and dry cotton to clean the device.