Support 5 Effects: CLEAN, CHORUS, FLANGER, METAL, WAH. It is suitable for electric guitar, bass, electric acoustic Guitar and other musical instruments with pickup. Built-in Audio Amplifier: The electric guitar headphone amplifier with true analog circuit faithfully simulates the response of amps. It allows you to play guitar with headphone without bothering neighbors. Built-in BT Receiver: The electric guitar pocket amp has blue tooth receiver function, background music can be input via BT, the earphone output allows you to use it anytime and anywhere. Notice: It can't be used to connect with other Bluetooth Devices; you can use phone/Pad to search and connect its Bluetooth to play background music. It can transfer both guitar voice & music signal to headphone or speaker. 8 Hours Battery Life: It has Built-in rechargeable lithium battery, continuous working more than 8 hours Portable & Enjoy Playing Music Freely: Mini guitar amp with small and compact size, you can pick up your guitar and start playing anywhere. Built-in amplifier could connect earphone or speakers to work independently by D3.5 output, background music of mobile phone can input through the BT receiver, you can play guitar anytime and anywhere . WARM TIPS The B6 is not a blue tooth transmitter, it is only a receiver, so it can not search BT device and not be used to connect with other BT devices( Such as Bluetooth headphones). The BT function is for playing background music streaming from a smart phone. So you can only use smart phone or Pad to search and connect its blue tooth to play background music. Charging Time: 5.5 - 6.5h(Standard Charge); 1.5 - 2.5h(Fast Charge) Charging Method: USB Charging Power Supply: Built-in rechargeable lithium battery BT Function: BT receiver for background music Frequency Response: 50Hz-18kHz Input Impedance:22Kohm Output Impedance:32ohm Blue Tooth Range: 8-10m Output: 1/8Inch