• Premium Material: It is made of quality material, durable and high-strength, not easy to break
• Indicator Light: Each charging dock has 5 LED indicator lights to let you know the charging status
• Easy to Use: Start charging once put into the slot, easy to use
• Can Charge Phone: With one USB port and one Type-C port for charging cellphones and other devices
• Ensuring Safety: Built-in multiple protections, such as overheat protection, overvoltage protection, overcurrent and short circuit protection, please rest assured of security
• Convenient Design: One-button power switch on the base to conveniently cut off/on the power 

Specification:

• Input voltage: DC 12V
• Input current: 4A
• Output voltage: DC 4.2V
• Output current: 0.5A
• USB port/Type-C: 5V/9V/12V
• Size: 360*214*65mm
• Weight: 2kg
• AC and DC adapter cable length: 150cm/59.06in

Compatible with:

• Retevis RT22/RT622/RT22S/RT22MX
• Retevis RB19/RB619/RB19P (a little loose)
• Retevis RB39/RB639/RB39P/RB639P (The opposite of RT22 positive and negative poles)