User's Manual

Charging of MUZEN OTR
OTR products are generally full charged within three hours, so please turn off the charger or pull
out the charging line after charging for three hours. There’s an indicator on the left side of the
charging port: red light means charging, green light means fully charged. OTR products have no
standard charging adaptor, you can use cellphone charger of 5V (500mA-2I), or plug in a PC USB
interface.
Durability of OTR Battery
The inner 1000mAH lithium polymer battery has passed UN 38.3 test, with greater capacity than
most Bluetooth speaker of the same volume, enables longer time for usage. Normal volume for
usage: Bluetooth 8-10 hours and reception 20 hours. Maximum volume for usage: Bluetooth ≥ 4
hours and reception ≥ 10 hours (fully charged). Please note that, when taking OTR products on
board, bring it with you all the time instead of by shipment, or it will be detected and confiscated.
Battery Replacement
Battery replacement is considered designing OTR products. The structure of inner battery
installation is available for replacement by manufacturer only. We will provide paid service for
potential user. Do contact us if necessary.
Charging and Using Simultaneously
OTR products is available for charging while using, however, the sound quality will be affected
by adaptor performance under Bluetooth status, and charging adapter is the switch power supply
under reception status, it will interfere the radio to receive signal, affecting reception performance.
Thus, we suggest do not charge while using OTR products.
Indicator Lights of OTR Products
MW-2I (radio function): reception——green (received successfully); blue, white, aux——orange;
charging——red; green——fully charged.
Band Switch of OTR Product
OTR band switch is tailored developed; please note that it’s 90 degree per gear, which is different
from the usual 30 degree per gear. No direction demand, either twist clockwise or
counter-clockwise will do.
Radio Antenna
OTR products are designed to receive without using outside antenna
Human Induction of OTR Radio
When the station signal is weak, it may be clearer by holding in hand, and becomes weak again
leaving hand. It’s called human induction, and more or less this problem exists in most radios.
Bluetooth Connection
OTR products adopt CSR chip set, one of the best Bluetooth solution at present, with liable and
stable performance, receiving distance is greater than and equal to 5 meters. Some user complaint
that failed to connect Bluetooth, that's because too many Bluetooth connections exist in your
cellphone (or iPad). Delete the existing connections, reboot the cellphone, and re-connect OTR