Compatibility: This charger is compatible with Motorola TETRA radios MTP850, MTP850S, CEP400, MTP830S, MTP850FUG, and MTP800
Dual Pocket: The front pocket of this desktop unit will charge an MTP850, MTP850S, or CEP400 radio with a battery attached. The rear pocket will charge a spare battery
Charging Priority: The front pocket has priority over the rear pocket. When the front pocket is charged, the rear pocket will start charging