Exclusive Tri-Size DC Ports No Adapters NeededThe only heated vest battery pack with three native 7.4 V DC jacks (3.5 mm, 3.8 mm, 4.0 mm) built right in. No dangling adapter cables, no extra bulk, and nothing to lose. Just plug and play compatible with most 7.4 V heated jackets and vests Power Heat + USB Devices at the Same TimeRun your 7.4 V heated garment while charging your phone or tablet through USB-A and USB-C simultaneously. Stay warm and connected all day without unplugging your jacket to top up your devices. (Note: two DC garments at once are not supported.) Pro-Grade LED Display for Total ControlSmart digital meter shows battery level in 1% steps plus real-time voltage and current per port. Press once to switch between battery %, current, and voltage.no more 50% then sudden shutdown surprises 30 W PD Fast Recharge + Certified SafetyUSB-C PD in/out up to 30 W (520 V) recharges the pack 0100% in 2.9 h with a 30 W charger (5.8 h @15 W; 8.7 h @10 W). M