Common compact configurations are 4-, 5-, 7- and 9-pad setups; small electronic kits and pad controllers typically use one of these layouts.
Most drum pads use either mesh or silicone surfaces: many kits feature dual-zone mesh pads for realistic rebound, while roll-up and portable practice pads are commonly made from durable silicone.
Typical connectivity and recording features include USB and MIDI ports, headphone jacks, audio inputs/outputs, Bluetooth on some models, and built-in recording/playback functions for capturing performances.
Roll-up silicone pads are lightweight and foldable for easy storage and travel; many are designed to fit in backpacks or travel bags for practice on the go.
Many portable kits include built-in stereo speakers (some list dual stereo or two 3W speakers) and a headphone jack for private practice, plus the ability to connect external speakers or PA systems.
Many pads are velocity-sensitive, and several models offer dual-zone or multi-zone surfaces that register different strike areas or layer sounds for more expressive playing.