Please list the device models of all the devices used by a user in the M23-26 user group.
M23-26 user group refers to `group` = 'M23-26';
SELECT T2.device_model FROM gender_age AS T1 INNER JOIN phone_brand_device_model2 AS T2 ON T1.device_id = T2.device_id WHERE T1.`group` = 'M23-26'