Lenovo Dual-Mode Wireless Active Noise Cancelling 6550 Headset

Performance
Product type The sub-category of the product.	Headset
Wearing style The way in which the device is worn.	Head-band
Recommended usage What the product should be used for, and how it should be used (e.g. ambient temperature).	Office/Call center
Headset type A headset is headphones combined with a microphone, or one headphone with a microphone. Headsets provide the equivalent functionality of a telephone handset but with hands-free operation. Types of headsets include single earpiece (monaural) and double earpiece.	Binaural
Product colour The colour e.g. red, blue, green, black, white.	Black
Operating keys	ANC control, Microsoft Teams button, Mute, Play/Pause, Voice assistant, Volume +, Volume -
Control type The way in which the device is controlled.	Buttons
Cable length How long the cable is.	1.3 m
Cable colour Colour of the cable e.g. white, gray.	Black
LED indicators
Number of simultaneously connected devices (max)	2
Certification	CB, BQB, CE, TUV mark, UKCA, RCM, EAC, cTUVus, FCC, ICES, WPC, SRRC, SIRIM, KC, IMDA, SDPPI, JRF

Ports & interfaces
Connectivity technology The technology that enables connectivity of the device, e.g. wired or wireless.	Wireless
USB connectivity The product has USB connector.
USB connector What type of USB connector is built into the device.	USB Type-C
Bluetooth Bluetooth is a low-power radio technology developed to replace the cables and wires currently used to link or connect electronic devices such as personal computers, printers, and a wide variety of handheld devices including mobile phones. Because it uses radio-wave connectivity, a Bluetooth-enabled device has a constant, established connection to whatever browser it uses. This saves the user the trouble of logging on to check for emails or news updates, for example.
Bluetooth version The type of bluetooth technology in the product e.g. Bluetooth Smart (v4.0).	5.3
Wireless range	30 m

Headphones
Ear coupling Ear coupling describes the way in which headphones or earphones stay attached to, or inside, the ear. There are three common types of ear coupling: circumaural, supra-aural and intra-aural. Circumaural headphones enclose your ears with large pads that suppress external noise. Supra-aural headphones are typically more lightweight and sit on top of the ears with small pads. Intra-aural headphones come in two basic designs and neither style sits on the head itself. The first are ear buds, which sit just outside of the ear canal, on top of your ear lobes. The second type is actually inserted directly into the ear canal and offers some external noise suppression.	Circumaural
Headphone frequency The range of frequencies (low to high sounds) that the headphones can produce.	20 - 20000 Hz
Impedance The effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance.	32 Ω
Headphone sensitivity	115 dB
Driver unit	4 cm
Total Harmonic Distortion (THD) Total harmonic distortion is a measure of non-linear harmonic distortion and is given in %. Non-linear harmonic distortions are signals which were not present in the original before the signal was converted by the headphones. These unwanted signals are caused by the diaphragm, whose movements do not precisely move in time with the electric signals that cause it to move. Unfortunately, this is a feature of all electroacoustic transducers. Although it cannot be completely eliminated, suitable steps can be taken to minimise it. However, the user is not interested in why this distortion takes place but in how great the level of distortion must be for it to become perceptible. According to the findings of several research projects, a total harmonic distortion of 1% in the frequency range of 100 to 2000 Hz is imperceptible. Below 100 Hz, the perceptibility threshold lies at 10%.	2%

Microphone
Microphone type The characteristics of the microphone bulit into the device in terms of the reception of signals from all or just one direction, i.e. omnidirectional (better for concerts and the like vs unidirectional, more suitable for voice recording.	Boom/Built-in microphone
Microphone direction type	Unidirectional/Omnidirectional microphone
Number of microphones	2
Microphone noise-canceling
Microphone mute

Battery
Battery capacity A measure of the charge stored by the battery. Determined by the mass of active material contained in the battery.	640 mAh
Continuous audio playback time Number of hours on average for continuous play. This is dependent on the device battery capacity.	60 h
Battery voltage The voltage (V) of the battery.	5 V

System requirements
Windows operating systems supported Windows vesions wich can be used with the device.	Windows 10
Mac operating systems supported Mac operating systems e.g. OS X can be used with the device.
Mobile operating systems supported The operating systems e.g. Android, iOS, that can be used with the mobile device.	Android, iOS

Operational conditions
Operating temperature (T-T) The minimum and maximum temperatures at which the product can be safely operated.	0 - 45 °C
Operating relative humidity (H-H)	0 - 90%

Weight & dimensions
Weight Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.	165 g

Packaging data
Package width The distance from one side of the packaging to the other.	194 mm
Package depth The distance from the front to the back of the packaging.	161 mm
Package height The distance from the top to the bottom of the packaging.	51 mm
Package weight Weight of the packaged product.	365 g
Package type The type of product package e.g. box.	Box

Packaging content
AC adapter included
Receiver included The product includes a receiver, which is a device for picking up an external signal.
Wireless receiver interface	USB Type-A
Cables included	USB Type-C to USB Type-C
Pouch

Power
USB Type-C charging port

Supplier features
Charging time	120 min

Certificates
Certified for Microsoft Teams