Payment object reader device with multiple types of reader circuitry

A point of sale (POS) system for transactions, the POS system comprising:

• a transaction application stored in a memory of a first device, the transaction application including transaction application instructions that, when executed using one or more processors of the first device, cause the first device to transmit payment object information from the first device to a payment processing service via a network, thereby causing a payment transaction associated with the payment object information to be processed;
• and
• a payment object reader device communicatively coupled to the first device, the payment object reader device comprising:
• a first type of reader circuitry that is configured to read a first type of payment object,
• a second type of reader circuitry that is configured to read a second type of payment object,
• communication circuitry that is configured to communicate with the transaction application of the first device,
• a reader processor that is configured to execute reader instructions effective to receive payment object information from at least one of the first type of reader circuitry or the second type of reader circuitry, and to cause the communication circuitry to transmit the payment object information to the transaction application of the first device, and
• power circuitry that is configured to provide electrical power to at least the reader processor and the communication circuitry.