The Pulsar 510 Hall Pass is a 650mAh pen-style cart battery with 5 variable voltage settings (1.8V–3.8V), preheat function, and USB-C charging — built for smooth, customizable 510 cartridge sessions. Compatible with up to 3g Carts! 5 Voltage Settings: 1.8V, 2.4V, 2.8V, 3.4V, 3.8V — color-coded LED for easy selection 8-Second Preheat: Warms thick oils at 1.8V for clog-free, smooth first draws 650mAh Battery: All-day power with fast USB-C recharging Universal 510 Thread: Fits carts up to 14mm x 65mm Removable Mouthpiece Cap: Conceals and protects your cartridge LED Battery Indicator: Green (75% ), Blue (25–75%), Red (<25%) 10-Second Safety Timer: Auto-standby for protection