Package Included: 1 x Trucker bluetooth headset 1 x Charging Cable 1 x User Manual No noise canceling: Specification: Model Number:F-SL003 Color: Black bluetooth Version: 4.1 Wireless Working Range: 10M Frequency:2402MHz-2408MHz ISM Band Standby time: about 100 hours Charging voltage: 5V Charging time: <3 hours Microphone sensitivity: -45dB Talk time: 5 hours Working voltage: 3.3-4.2V Charging current: 95mA Noise canceling: Specification: Model Number:A50728 Color: Black bluetooth Version: 2.1 Wireless Working Range: 10M Frequency:2.4G Standby time: About 350 hours Charging voltage: 5V Charging time: <8 hours Microphone sensitivity: -45dB Talk time: 20 hours Working voltage: 3.3-4.2V Charging current: 80mA Charger power supply: 110V-240V Features: -Adopt advanced 4x anti-noise technology and DSP digital signal processing, so you can keep a very clear conversation when you talk; -Compatible with all bluetooth mobile phones and other bluetooth devices, supporting one with two functions; -Suitable for office use, with bluetooth adapter allows you to enjoy wireless fun when using SKYPE, MSN or Internet phone, clear call effect can provide convenience for you at work, completely free your hands. Note: -The color of the item may vary slightly due to photography and different PC monitor, and the size might be slightly errored due to manual measurement. Your kindly understanding would be appreciated.