Specifications; Safety Notes - Serafim A1 Manual

Specifications

Headphone
Driver: Dynamic, 50mm with neodymium
magnets
Type: Circumaural, Closed back
Frequency response: 20Hz–20kHz
Impedance: 21 Ω
Sound pressure level: 109dBSPL/mW
(1kHz)
T.H.D.: < 15%
Weight: 310g
Weight with mic: 320g
Cable length and type: USB charge cable
(1m)
Connector: Headphone-3.5mm (4-section
type)+USB

Safety Notes

*If you encounter problems with the correct operation of the device, and the troubleshooting does not
help, please unplug the device and contact our online customer service, or go to
https://serafim-tech.com/contact
under any circumstances, otherwise the warranty will be invalid.
*In order to maintain the sound quality of the device, when using the device and charging at the same
time, do not charge with low-current power sources, such as low-voltage charging devices, computer
USB ports.. etc.
*Keep the device away from liquid or any humid environment. Operate this device within the ideal
temperature range (0°C (32°F) to 40°C (104°F)). If the temperature is out of the ideal range, turn off the
device until the temperature returns to the ideal range.
*Do not use it at excessive volume for a long time, otherwise it may damage your hearing. In addition,
the laws of some countries/regions stipulate that in an environment that affects hearing and has a
sound volume of 86 decibels, you may not stay for more than 8 hours a day. Therefore, it is
recommended that if you want to use the headset for a long time, turn down the volume as much as
possible. Please be sure to maintain your hearing health.
*Audio Box has a built-in rechargeable lithium battery. Generally speaking, the service life of this
battery is usually related to usage habits. If you think the included rechargeable lithium battery is
exhausted (low battery), please try charging first. If the battery cannot be charged smoothly after many
attempts, the battery may be out of use. Do not disassemble and replace the battery by yourself.
Microphone
Element: Electret condenser microphone
Polar pattern: Omnidirectional,
Noise-cancelling
Frequency response: 100Hz-10KHz
Sensitivity: -42±3 dB
Impedance: 2.2kΩ
Audio Box
Battery capacity: 550mAh
usage time (headphone LED off): 8hr*
usage time (headphone LED on): 3hr*
Charging time: 3hr(0%-100%)
Weight: 70±2 g
Cable length: 1 m
* The use time will vary due to factors such
as user habits or volume
for support. Do not try to disassemble or repair this device yourself
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