Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: RAPOO | M7800P-B 5G Wireless 1600 DPI Laser Mouse with ZOOM in and out Function - Black (Nano Receiver) / 12 months battery life
Product description: @BestBuy - Always Stand By You ! RAPOO | M7800P-B 5G Wireless 1600 DPI Laser Mouse with ZOOM in and out Function - Black (Nano Receiver) / 12 months battery life Reliable 5GHz wireless transmission far away from the interference of 2.4GHz wireless, bluetooth and WIFI device. 360 degree wide range and long transmission distance up to 10m Adjustable high-definition laser engine between 800 and 1600 CPI 4D Scroll wheel, scroll up / down, scroll side to side, and also as a button Operate with single or double battery to choose the comfort of the weight Ergonomics full-size design enhanced grip comfort Originate Zoom in & out button, zoom in or out where the cursor was located (work with WIN 7 or above) Advanced programmable-buttons to set a hotkey for "progress" keys & button macros Power Saving Technology, 2 batteries life up to 12 MONTHS Power switch off buttom to save and low battery indicator to remind Nano Receiver-In-Mouse design for convenient carrying Fully plug and play Support Windows XP/VISTA/7, Windows 8 Driver is available (You can download Rapoo mouse driver from website and define the keys function as you want.) Power supply: 3V, AA2 Alkaline batteries included
Product feature: 7800P is a wireless laser mouse, which adopts reliable 5GHz wireless transmission far away from the interference of 2.4GHz wireless, bluetooth and WIFI device., You can instantly choose between 800 DPI for accuracy and 1600 DPI for fast movement by pressing the DPI button., With Zoom-in / Zoom-out button, you can zoom screen on your finger-tips. With the forward/back buttons, you can get easy to review website or profile., 6 Programmable keys save time by using customized buttons, as Forward, Back, Tilt-wheel, Zoom-in, Zoom-out, etc for quick responses., Ultra small nano receiver is so small and unobtrusive that you can plug it into a USB-port and forget about it. No more worries about lost receivers.
Product brand: Rapoo
Target attributes: Sensor
Answer: attribute: sensor
value: laser
source: product description
attribute: sensor
value: laser mouse
source: product feature
attribute: sensor
value: laser mouse
source: product title
attribute: sensor
value: laser mouse
source: product description