Main Features:- Large digital 12cm screen display¡¢ time¡¢ playback mode¡¢ power display clearly;- Alarm clock function¡¢ timing-off and wake up;- One key alarm setting and alarm off ( press 1 )¡¢ simple steps¡¢ all ages;- Timing shutdown¡¢ accompanied by wonderful music;- 18650 replaceable battery¡¢ long playback time;- Save energy¡¢ standby time can be 200 days;- High quality¡¢ high power output¡¢ sound will be loud and clear;- Large silicone keys¡¢ digital song selected radio frequency band¡¢ comfortable and convenient to operate;- A key clock¡¢ radio¡¢ music functions;- Support fast forward and back;- Sleep timer¡¢ can choose 15 minutes¡¢ 30 minutes¡¢ 45 minutes¡¢ 60 minutes;- Built-in radio module¡¢ an external antenna can shrink¡¢ radio is very effective;- TF or U disk can be used to play music¡¢ up to 16G;- Support power and memory;- Multifunction cable for computer charging¡¢ download and loud speaker;- Standard 3.5mm headphone jack;- 360 degrees sound adjustment wheel design¡¢ volume adjustment more precisely;- Portable design¡¢ easy to carry. Model: L - 80 Design: Multifunctional¡¢Portable Compatible with: TF/Micro SD Card Supports: TF Card Music Playing Functions: Songs Track Connection: Wireless Audio Source: TF/Micro SD Card Color: Silver¡¢Black Power Output: 3W Power Source: Battery Working Voltage: 5V Charging time: 2 - 3 hours Lasting Time: 10 - 20 hours Battery Capacity: 1200mAH Operating Range: 87.5MHz - 108MHz Battery Type: 18650 lithium battery Battery Voltage: 3.7V Package weight: 0.282 kg Product size (L x W x H): 11.000 x 2.500 x 6.500 cm / 4.331 x 0.984 x 2.559 inches Package size (L x W x H): 14.500 x 3.500 x 8.000 cm / 5.709 x 1.378 x 3.150 inches Package Contents: 1 x Amplifier¡¢ 1 x USB Cable¡¢ 1 x English User Manual