Model Number: HCR-190RDN Brand Name: Esense Key Specifications/Special Features: Features:Simple shape design, adds the elements of Chinese porcelain in the design having outstanding characters from the traditional IT products mostly conservative white or black colorsUSB dongle is designed slim enough to snap into the main bodyConvenient design to cut off the power automatically when the receiver is plugged into the presenterNot necessary to install any software or driver before starting, easy to operateHigh-frequency connection: using the 2.4GHz frequency band, can automatically search channels and avoid possible disturbanceSpecifications:

• Frequency range: 2,400 to 2,483MHz
• Remote range: 10 meters
• Power: AAA batteries x 1
• Output power: under 1mW
• Size (L x W x H): 137 x 31 x 22mm