diff --git a/README.md b/README.md
index 35694c6..f654550 100644
--- a/README.md
+++ b/README.md
@@ -21,3 +21,6 @@ External ressources
 - https://gitlab.com/ifb-elixirfr/cluster/utils/slurmspawner/
 - https://gitlab.com/idris-cnrs/jupyter/jupyter-jeanzay-spawner/
 - https://github.com/jupyterhub/batchspawner
+- https://jupyterhub.readthedocs.io/en/stable/reference/spawners.html
+- https://getbootstrap.com/docs/3.4/css/
+- https://getbootstrap.com/docs/3.4/components/
diff --git a/src/glicid_spawner/resources.py b/src/glicid_spawner/resources.py
new file mode 100644
index 0000000..6d833d4
--- /dev/null
+++ b/src/glicid_spawner/resources.py
@@ -0,0 +1,36 @@
+"""Resources module."""
+
+from dataclasses import dataclass
+
+
+@dataclass
+class Resource:
+    """Cluster generic resource."""
+
+    description: str
+    max_duration: int
+
+
+CPU = [
+    Resource('1', 24),
+    Resource('2', 12),
+    Resource('4', 6),
+    Resource('8', 3),
+    Resource('12', 2),
+    Resource('24', 1),
+]
+
+RAM = [
+    Resource('4', 24),
+    Resource('8', 12),
+    Resource('16', 6),
+    Resource('32', 3),
+    Resource('48', 2),
+    Resource('96', 1),
+]
+
+GPU = [
+    Resource('no', 24),
+    Resource('A40', 2),
+    Resource('A100', 1),
+]
diff --git a/src/glicid_spawner/spawner.py b/src/glicid_spawner/spawner.py
index 1d516a4..eb3cfdf 100644
--- a/src/glicid_spawner/spawner.py
+++ b/src/glicid_spawner/spawner.py
@@ -4,6 +4,7 @@ from batchspawner import SlurmSpawner
 from jinja2 import Environment, PackageLoader, select_autoescape
 
 from .pyenv import get_pyenv
+from .resources import CPU, GPU, RAM
 
 
 class GlicidSpawner(SlurmSpawner):
@@ -20,9 +21,33 @@ class GlicidSpawner(SlurmSpawner):
         return template.render(
             username=self.user.name,
             python_envs=get_pyenv(self.user.name),
+            cpu_available=CPU,
+            ram_available=RAM,
+            gpu_available=GPU,
         )
 
     def options_from_form(self, formdata) -> dict:
         options = {}
         options['pyenv'] = formdata['python-env'][0]
+
+        # Index of user resources choices
+        i_cpu = int(formdata['cpu'][0])
+        i_ram = int(formdata['ram'][0])
+        i_gpu = int(formdata['gpu'][0])
+
+        duration = min(
+            CPU[i_cpu].max_duration,
+            RAM[i_ram].max_duration,
+            GPU[i_gpu].max_duration,
+        )
+
+        # Export options
+        options['cpus-per-task'] = CPU[i_cpu].description
+        options['mem'] = RAM[i_ram] + 'GB'
+
+        if i_gpu:
+            options['gres'] = 'gpu:' + GPU[i_gpu]
+
+        options['time'] = f'{duration:02d}:00:00'
+
         return options
diff --git a/src/glicid_spawner/templates/interactive.html b/src/glicid_spawner/templates/interactive.html
index 89f3003..0519d75 100644
--- a/src/glicid_spawner/templates/interactive.html
+++ b/src/glicid_spawner/templates/interactive.html
@@ -1,8 +1,8 @@
 <div class="form-horizontal">
     <div class="form-group">
-        <label for="username" class="col-sm-3 control-label">Username:</label>
+        <label class="col-sm-3 control-label">Username:</label>
         <div class="col-sm-9">
-            <input class="form-control" name="username" type="text" placeholder="{{username}}" disabled>
+            <div class="form-control-static">{{ username }}</div>
         </div>
     </div>
     <div class="form-group">
@@ -10,9 +10,69 @@
         <div class="col-sm-9">
             <select class="form-control" name="python-env">
                 {%- for pyenv in python_envs -%}
-                <option value="{{pyenv.path}}">{{pyenv.name}} ({{pyenv.scope | upper}})</option>
+                <option value="{{ pyenv.path }}">{{ pyenv.name }} ({{ pyenv.scope | upper }})</option>
                 {% endfor -%}
             </select>
         </div>
     </div>
+    <div class="form-group">
+        <label for="cpu" class="col-sm-3 control-label">CPU:</label>
+        <div class="col-sm-9">
+            {%- for cpu in cpu_available -%}
+            <label class="radio-inline">
+                <input type="radio" name="cpu"
+                    value="cpu-{{loop.index0}}"
+                    data-max-duration="{{cpu.max_duration}}"
+                    {%- if loop.first -%}checked{%- endif -%}
+                > {{ cpu.description }}
+            </label>
+            {% endfor -%}
+        </div>
+    </div>
+    <div class="form-group">
+        <label for="ram" class="col-sm-3 control-label">Memory:</label>
+        <div class="col-sm-9">
+            {%- for ram in ram_available -%}
+            <label class="radio-inline">
+                <input type="radio" name="ram"
+                    value="ram-{{loop.index0}}"
+                    data-max-duration="{{ram.max_duration}}"
+                    {%- if loop.first -%}checked{%- endif -%}
+                > {{ ram.description }} GB
+            </label>
+            {% endfor -%}
+        </div>
+    </div>
+    <div class="form-group">
+        <label for="gpu" class="col-sm-3 control-label">GPU:</label>
+        <div class="col-sm-9">
+            {%- for gpu in gpu_available -%}
+            <label class="radio-inline">
+                <input type="radio" name="gpu"
+                    value="gpu-{{loop.index0}}"
+                    data-max-duration="{{gpu.max_duration}}"
+                    {%- if loop.first -%}checked{%- endif -%}
+                > {{ gpu.description }}
+            </label>
+            {% endfor -%}
+        </div>
+    </div>
+    <div class="form-group">
+        <label class="col-sm-3 control-label">Session duration:</label>
+        <div class="col-sm-9">
+            <div class="form-control-static"><span id="time-max-duration">24</span> h</div>
+        </div>
+    </div>
 </div>
+
+<script>
+    var $reservations_dropdown = $("#time-max-duration");
+
+    $('input[type=radio]').change(function() {
+        var cpu = $('input[name=cpu]:checked').data('max-duration');
+        var ram = $('input[name=ram]:checked').data('max-duration');
+        var gpu = $('input[name=gpu]:checked').data('max-duration');
+
+        $reservations_dropdown.text(Math.min(cpu, ram, gpu));
+    })
+</script>