Descriptions	Firmware1.0 (before Jun 30, 2016)	Firmware2.0 (after July 1, 2016)
Common The missing alarm will ring instead of the low voltage alarm when the external battery is disconnected while the external battery is being connected to the DroneKeeper mini.	low voltage alarm	missing alarm
Wireless Mode only Trigger point of motion sensor timer: User can select the trigger point of motion sensor timer(30sec, 1min, 5min, 8min, 10min). The missing alarm will ring after the trigger point of motion sensor timer if there is no any movement. Trigger point of power on timer: User can select the trigger point of power on timer(30min, 60min, 90min). The missing alarm will always ring after power on regardless of motion sensor status to prepare the worst case. (ex: strong wind) Sensitivity of motion sensor	fixed 30sec n/a sensitive	selectable (30sec, 1min, 5min, 8min, 10min) selectable (30min, 60min, 90min) insensitive
Wired Mode only Trigger point of R/C receiver signal was changed for the missing alarm	n/a	+120us

DroneKeeper Mini is the 2nd generation stand-alone audible sound locator to find lost drones with internal battery
Can work without any connection with built-in Motion sensor
Can use all kinds of drone
Supports 2 in 1 function (Locator + Low voltage alarm)
High quality, performance and lightweight(6g)
Very easy to use, just mount on drone
Can work regardless of main battery status
Possible to recognize the beep sound in a noisy downtown area within a 50~60meter(164~197feet) radius

Missing alarm will ring if there is no any movement of drone at Wireless mode
Missing alarm will ring if a receiver loses signal or power at Wired mode
Can connect the auxiliary buzzer
Supports 2 kinds of user mode (Wireless mode, Wired mode)
Built-in motion sensor for Wireless mode
Can change the trigger point of motion sensor timer(30sec, 1min, 5min, 8min, 10min)
Can change the trigger point of power on timer(30min, 60min, 90min)
Supports Low battery voltage alarm for external battery(main battery of drone) and can be changed from 3.2V to 3.6V by user
Supports Low battery voltage alarm for internal battery
Wide input voltage range from 5V to 17V (LiPo 2S to 4S)
Power switch off detection alarm at Wired mode only
Automatic internal battery charging when external power is connected
Can also charge the internal battery via the PC USB port using a provied micro USB module
Pb-free, Internal battery with PCM(Protect Circuit Module)

Input Voltage	DC 5V ~ 17V (LiPo 2S ~ 4S) via RCV-CON (※2S~3S recommend)
Power consumption	Standby: max 26mW, Operation: max 189mW
Battery life time	Operating time: about 2.5hours @since the missing alarm rings Stand-by time: about 6.5hours @without the missing alarm
Charging time of the internal battery	about 1hour after full discharged
R/C receiver reference signal pulse width	PWM center 1,500us [1.5ms], compatible with most of receiver
Sound pressure level	min 90dB @10cm
Operating temperature	-10˚C ~ 50˚C
Dimensions	35mm x 14mm x 11mm
Weight	6g