The module allows you the POS user to add notes on each order lines on the POS cart and also on complete POS order. The notes show up on the Odoo POS receipt.
The user can display the product quantities on the Odoo POS with the module. If set, The user cannot add out of stock products to the POS cart.
The module allows you to create discount coupons and vouchers in Odoo POS. The voucher code can be used by the customer to obtain discount on orders.