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: Unlocked Smartphone 6.0" Dual Sim MTK6580 Quad Core 1GB/8GB-JUNING Android 5.1 Cellphone Black
Product description: Specifications: Band:2G: GSM 850/900/1800/1900MHz;3G: WCDMA 850/2100MHz Sim Card:Dual SIM Card Dual Standby(one Micro SIM card) Service Provide:Unlocked Style:Bar Color:Black OS:Android 5.1 CPU:MTK6580 Quad core, 1.3GHz; GPU: Mali-400 ROM:8GB RAM:1GB Display Size:6.0Inch Type:TFT, capacitive touch screen Resolution:1280 x 720 pixels Data transfer:USB/Bluetooth Mobile internet:WAP/WiFi Camera/Picture Resolution:Dual Cameras, 2.0MP front camera, 2.0MP back camera TV:No GPS:No JAVA:No WIFI:Yes, 802.11 b/g/n Bluetooth:Bluetooth 2.0 Gravity Sensor:Yes Multi-Touch:Yes Other Feature:3G, WiFi, GPS, FM, Bluetooth, Email, Messaging,Wallpapers, Calendar, Calculator, Clock, Camera, Play Store, Tethering & portable hotspot, etc Package 1 x Cellphone 1 x Battery 1 x USB Cable 1 x Charger 1 x Earphone
Product feature: 3G (WCDMA 850/2100) and 2G Quad Band (GSM 850/900/1800/1900) network.please buy the GSM/WCDMA SIM card. Do not buy the CDMA SIM card from them., CUP:MTK6580 Quad Core 1.3GHz;GPU:Mali-400MP;RAM&ROM: 1GB + 4GB, Unlocked Dual Sim Cell phones, Android 5.1 Lollipop, Dual Cameras, front camera 2.0MP, back camera 2.0MP, Desbloqueado Dual SIM, smartphone con Android 5.1 Lollipop. 6.0" HD(1280 x 720) Screen, NOTE: Remove the backside yellow film of the battery that can charge, and the phone will turn on and work.
Product brand: JUNING
Target attributes: Weight
Answer: attribute: weight
value: None
source: None