You can use AT10U3 Android USB Cash Drawer Trigger. It allows direct connection to your android tablet or mobile phone to open cash drawer without printer, provides stable connection and fast data communication.
NO external power supply and NO external OTG adapter needed, can Direct Connect Cash Drawer to your Android Mobile Device.

USB or Bluetooth connection which is more efficient to open cash drawer in Android ? There is no one right answer to this question.

AT10U3 USB cash drawer trigger is a wired device that uses a cable to connect to your mobile phone to control opening of cash drawer. It provides faster communications, consistent connections, reliability and more security. While AT10B3 bluetooth cash drawer trigger is a wireless device, to connect wirelessly with your mobile phone to control opening of cash drawer. Wireless connectivity offers greater mobility and freedom of movement. However, bluetooth connection is easily get distorted by other bluetooth or Wifi devices, this may cause bluetooth connection breakup. The choice between USB vs Bluetooth connection depends on your work environment, mobility needs and compatibility.

No, you don’t need special cash drawer.
Any cash drawer that is :

• cash drawer RJ12, 6 pin plug
• electrical 12~24Volts, DC, <100 Msec, 1A
• solenoid : PIN 2 & 4 or PIN 4 & 5

If you have any questions, please contact us enquiry.hk@acode.com.

ACODE 10U3 Plus Series 10U3 '00102-00001' or '00102-0300x' USB Cash Drawer Trigger can detect cash drawer’s open/close status. The USB Trigger module will automatically return the opening code, making it easy for system developer/programmer to solve the detect open/close issue. Both your cash drawer and POS App need to have the provision of sensing open/close function. If you have any questions, please contact us : enquiry.hk@acode.com.