model

B168

Picture

Dimension 

Φ43*50mm

weight

nw :60 grams    gw:105 grams

magnet

material rare earth size:Φ12.5*2.5mm

effectiverange

15m

impedance

4 ohm ± 15% at 1300 hz/1v

lowest resong frequency

450 hz

output sound pressure level (s.p.l)

100±3db/1watt.0.1 meter at open field           average at 1000,1200,1500,2000hz                     

frequency range

450-10,000hz.average spl-10db

thd

5%maximum at 1300hz.2w

abnormail sound test

must be normal tested by 4.0 volts.sine wave

bat

320mA

Overcharge protection voltage

5±0.5V

rms

(RMS)3.0X1 W

snr

85±2db

led

Red and blue

Bat Factpru settomgs

≥3.7V   (≥80%)

storage temperature

_25 C   TO +50C

operating temperature

_25 C   TO +50C