Custom printed volt power banks with speaker 3500mAh are 2-in-1 promotional gifts that will allow your customers to enjoy their music, while powering devices. This power bank can be used to charge multimedia devices with cables included within it. For enjoying music, remove the top cover and insert the audio plugs to the audio port of the power bank and phone. There is an USB input cord that can be connected to the computer to recharge the power bank. There are LED lights that indicate charging status. Rechargeable lithium battery can be charged to the full capacity in 4 hours. Order today to receive free digital proofs and free design assistance.

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