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The Elf Bar 4 in 1 Ultra 50 is a rechargeable prefilled pod vape kit with four flavours in the box, packed as two refill packs of two flavours each.
The kit holds one at a time, and a switch on the front changes between its two flavours. When the first is empty, the second goes in.
Elf Bar makes it compatible with the Elf Bar Dual 10K kit, so the two kits take the same refill packs.

Every Ultra 50 box holds two refill packs, and each one carries two flavours, one in each pod. You fit one, vape both of its flavours using the switch, and keep the second in the box until the first is empty. That gives four flavours from one kit and one battery, without buying a refill pack straight away.
The switch sits on the front of the kit, above the battery display. Slide it to one side to vape one flavour and to the other side for the second. It stays in place the whole time, so changing flavour is a single slide with nothing to take out. Elf Bar lists this on the kit as Easy Flavour Switching.
The 850mAh battery is built in and charges over USB-C, so the kit is kept and recharged between refills. A three-level display under the switch shows the charge at 25%, 50% and 100%, which tells you at a glance when to plug it in. Only the refill packs are replaced, never the device itself.
Elf Bar makes the Ultra 50 in 10 flavour editions, and each edition has four flavours across its two packs. Every flavour is 20mg nic salt.

| Spec | Detail |
| Type | Rechargeable prefilled pod kit |
| Flavours | 4 per kit, 2 per refill pack |
| Refill packs | 2, each with 2 x 1ml prefilled pods and 2 x 5ml refill containers |
| E-liquid | 24ml per kit, 12ml per pack |
| Nicotine | 20mg nic salt |
| Puffs | Approximately 50,000 per kit |
| Coil | Mesh coil in each pod |
| Battery | 850mAh, built in |
| Charging | USB-C |
| Display | Three-level battery display |
| Flavour switch | On the front of the kit |
| Fits | Elf Bar Dual 10K refill packs |
The Elf Bar 4 in 1 Ultra 50 is a flavour vape with four flavours in one kit, packed as two refill packs of two. The refill pack that is fitted holds two flavours, and the switch on the front changes between them. When it is empty, the second goes in for the other two flavours.
That works differently from 4 in 1 kits such as the IVG 2400, which hold four 2ml pods at once and turn to change flavour. The Elf Bar takes two 12ml packs instead, 24ml in all.
Elf Bar rates the 4 in 1 Ultra 50 at approximately 50,000 puffs across the whole kit, which is where the 50K name and the large 50 on the box come from. That figure covers both refill packs, not one.
The two hold 24ml of e-liquid between them, and the e-liquid is the better guide to how long the kit lasts. How often and how long you draw changes the puff count more than anything else.
Puff ratings are worked out differently from brand to brand, so the 24ml is the figure to compare with other prefilled pod kits.
The 4 in 1 Ultra 50 takes Elf Bar Dual 10K refill packs, the same ones as the Dual 10K kit. Each pack has two 1ml pods and two 5ml refill containers, one flavour on each side.
Elf Bar's earlier 4 in 1 kit is a different device. It has a 1,500mAh battery and takes four 2ml pods, so its pods are not the same as the Ultra 50 refills.
Elf Bar's instructions for the Ultra 50 take four steps:

When the first is empty, lift it out and fit the second from the box the same way. The kit charges by USB-C between refills.
Find Your Nicotine Strength
Personalised to this kit
Based on how many cigarettes you smoke per day, we'll recommend the right nicotine strength for the Elf Bar 4-in-1 Ultra 50 (50K) Prefilled Pod Kit. This kit supports both nic salt and 50/50 freebase e-liquids.
Cigarettes Per Day
Not sure what Nic Salts are? Read our guide
Avoid burnt coils - follow our coil priming guide
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By Elf Bar
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4 Flavours in 1 Kit
Approximately 50,000 Puffs
850mAh Built In Battery
Fits Dual 10K Refill Packs
Flavour
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