Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Quntoon QT063 15000mAh External Power Bank Battery Charger For iPhone 4S iPad 3 SAMSUNG HTC
Product description: Quntoon is a hot brand of external battery in Hongkong local market. With good public reputation and excellent product quality has won the trust of a public customer in Hongkong and China mainland. Features: Brand new high capacity 15000mAh USB Power Bank External Battery High output up to 5V, maximum 2.1A High-tech LED display, which can indicator showing percentage of power being charged USB cable with 8 connectors attached for charging different devices 8 connectors: Micro USB, Mini USB, Apple 30 Pin, Nokia, Sony, LG etc Allows Dual USB devices to charge at the same time Super protection function: Core intelligent protection, overcharge protection, discharge protection, leakage protection. High power conversion efficiency: the power conversion is as high as 90% or above, far higher than similar products. Only the battery-shaped display at front side is indicating charging or discharging status Press the button at down side while start charging devices (button is for start charging only while unplug cable for stop charging) Charging via USB to computer system or power adapter. Fit for: iPad / iPhone / iTouch / iPod / GPS / PDA / PSP / Camera / Mobile phone(Nokia,Samsung,Sony Ericsson etc) MP3/MP4 players / USB music speaker / Bluetooth products / USB AA/AAA battery charger Note: We supply 8 connectors, so you can charge most machines with this battery!! Specification: Capacity: 15000mAh USB 1 Output : 5V: 2.1A USB 2 Output : 5V: 1A Input Current: 5V / 800mA Working temperature: Below 40 degree Dimensions:121mm x 76mm x 22mm Package included: 1 x 15000mAh External Battery 1 x USB Cable with 8 Connector Adapter 1 x English user manual
Product feature: Dual USB Charger 5V/2A-1A charges 2 Devices Quickly. 2A output is for iPad/Tablet and 1A output is for iPhone/Smart phone, Charge for upto 55 hours for iPhone 4S 4 3Gs 3G and iPod Touch 1G to 5G, 80% of the new iPad (iPad 3) battery life and 120% of iPad 2, Comes with USB Cable with 8 Connector Adapter for charging your devices and the 1200Mah Power Bank itself, LED Light Display Indicates How Much Battery is Remaining, No AC charger and iPhone/ipad adapters is included, But Compatible with all USB chargers, or Charge through Laptop
Product brand: Quntoon
Target attributes: Maximum Output
Answer: attribute: maximum output
value: 5v
source: product description
attribute: maximum output
value: 5v
source: product feature