RQT899328Specifications● Bluetooth specification : version 2.0● Output : Power Class 2● Carrier frequency : 2.4 - 2.483 GHz● Operation distance : up to 10 m (33 ft.)● Compatible Bluetooth Profiles : A2DP(Advanced Audio Distribution Profile),AVRCP (Audio Video Remote Control Profile) ,HSP (Head Set Profile),HFP (Hands Free Profile)● Audio Codec : SBC● Battery : Ni-MH (1.2 V, min 620 mAh)● Playback time : 4.5 hours● Charge time : 3 hours● Total cord length : 0.6 m (2.1 ft.)● Plug (Earphones) : 3.5 mm (1/8 in.)● Dimensions (W × H × D) :Receiver 24.0 mm × 54.0 mm × 24.1 mm(15/16 in. × 2-1/8 in. × 15/16 in.)Transmitter 62.3 mm × 31.0 mm × 11.0 mm(2-7/16 in. × 1-1/4 in. × 7/16 in.)● Mass (Weight) :Receiver Approx. 30.4 (1.1 oz.)Transmitter Approx. 11.4 (0.4 oz.)● AC Adaptor :Input AC 120 V, 60 HzOutput DC 4.8 V, 720 mAPower consumption 6 W* Specifications are subject to change withoutnotice.Listening cautionDo not play your earphones at a high volume. Hearingexperts advise against continuous extended play.If you experience a ringing in your ears, reducevolume or discontinue use.Pay attention to the surrounding environment(traffic) when using the earphones while walking.Do not use while operating a motorized vehicle.It may create a traffic hazard and is illegal in manyareas.You should use extreme caution or temporarilydiscontinue use in potentially hazardous situations.Sound can be deceiving. Over time your hearing“comfort level” adapts to higher volumes of sound.So what sounds “normal” can actually be loud andharmful to your hearing. Guard against this bysetting your equipment at a safe level BEFOREyour hearing adapts.To establish a safe level:• Start your volume control at a low setting.• Slowly increase the sound until you can hear itcomfortably and clearly, and without distortion.Once you have established a comfortable sound level:• Leave it there.