※ご注文のタイミングによって在庫切れの可能性がございます。その際は、メーカー取り寄せになりますので別途ご連絡させていただきます。<br><br>B4 is a tube headphone amplifier、 the sound feels warmer than transistor products. It has built-in battery protection circuit. It powers off after is is fully charged automatically、 the charger LED turn to GREEN. Can realize the use of human intelligence. Else . When you charging the battery. This B4 amplifier can not turn ON until you pull out charger interface. because we design it work like that、 just make battery safe.<br>Direction for use: 1. .Ipod / Cellphone / MP3: connect to B4 INPUT socket by 3.5 to 3.5 audio cable. 2. .Switch & volume control share the same knob: Please rotate the VOL Knob to the left、 then plug in your Headset / earplugs to HEADPHONE socket. 3. .Turn on your media player、 and tune VOL knob from left to right till the volume is suitable. 4 .Turn off: When you do not want to listen、 please take off the headphone、 turn down the volune till the machine is powered off.<br>Notice: when you using B4 with your cellphone、 if you fell some \'\'zhi ~ zhi\'\' noise into your headphone That's usually the cellphone effect it Sometimes、 it's cellphone WIFI、 or 4G signal effect the tube Then the noise into the sound... . That's normal. Because all tube with some microphone effect case. Solve way is. just move your cellphone as far as possible from the B4.<br>サイズ：115 * 69 * 23 mm<br><br>商品番号:tk-2305793<table border='1' bordercolor='#DCDCDC' cellspacing='0' cellpadding='4' width='100%'><tr><th bgcolor='#eee' width='26%'>商品名</th><td>ＴＹＳＪLittle Bear B4 Portable Vacuum & Valve Tube Headphone Amplifier HiFi for Phone</td></tr><tr><th bgcolor='#eee' width='26%'>JAN</th><td>6245435009745</td></tr><tr><th bgcolor='#eee' >詳細</th><td>B4 is a tube headphone amplifier、 the sound feels warmer than transistor products. It has built-in battery protection circuit. It powers off after is is fully charged automatically、 the charger LED turn to GREEN. Can realize the use of human intelligence. Else . When you charging the battery. This B4 amplifier can not turn ON until you pull out charger interface. because we design it work like that、 just make battery safe.<br>Direction for use: 1. .Ipod / Cellphone / MP3: connect to B4 INPUT socket by 3.5 to 3.5 audio cable. 2. .Switch & volume control share the same knob: Please rotate the VOL Knob to the left、 then plug in your Headset / earplugs to HEADPHONE socket. 3. .Turn on your media player、 and tune VOL knob from left to right till the volume is suitable. 4 .Turn off: When you do not want to listen、 please take off the headphone、 turn down the volune till the machine is powered off.<br>Notice: when you using B4 with your cellphone、 if you fell some \'\'zhi ~ zhi\'\' noise into your headphone That's usually the cellphone effect it Sometimes、 it's cellphone WIFI、 or 4G signal effect the tube Then the noise into the sound... . That's normal. Because all tube with some microphone effect case. Solve way is. just move your cellphone as far as possible from the B4.<br>サイズ：115 * 69 * 23 mm<br><br></td></tr><tr><th bgcolor='#eee' >カラー</th><td></td></tr><tr><th bgcolor='#eee' >モデル</th><td></td></tr><tr><th bgcolor='#eee' >サイズ</th><td></td></tr></table><br><br>