Dola Quick calculation: in the spec: battery is 1,8Ah, at in HIGH mode it last for 6 hours, so 1,8Ah*3,7V devided with 6h=1,1W! 1W LED can procuse max 100LM, so the real LM about 110LM :(. Also, Vladm wrote as comment: „not brighter than my stock 100LM light”. Another approach: Anderas wrote it last for 2 hours in high mode, so assuming the battery is really 1.8Ah, it means 3,3W power, so max 330LM light. Math can’t cheat, something is wrong! It looks nice, but it's seems a weak lamp. In my opinion, evening cycling requires 3-7 Watts of real power, which means real 200-600 LM. Would anyone measure the real power (in Watt)?

Dola No, but the sise of the board is: 29,5x20x99,5mm (106mm long with the USB connector) 4 holes for screw: 2,9mm diameter, distance: 25x95mm

Dola Three operating modes, can be set with a jumper: 1. Self-lock (T) - jumper is on pins 1-2 (inside): When a button is pressed for the first time, the relevant relay (A B C D) turns ON, when same button is pressed again, relay switches OFF. The 4 relays can be used independently. Only one button can be operated at the same time, pressed one after the other, works nicely. 2. Jog (M) - jumper is removed: As long as the button is pressed, the relay is ON, when the button is released the relay switches OFF. The 4 buttons can be used independently and simultaneously. 3. Inter-lock (L) - jumper is on pins 2-3 (at edge): When the first button is pressed, the given relay turns ON, when another button is pressed, this relay switches OFF and the other turns ON. After the first press, one relay is always ON. When you press several buttons at the same time, the first one is ON all the time, the others are ON only until you press the button.

Dola Yes. The wiring is depends on the lock. Most cases the Jog (M) mode will work fine: jumper is removed: As long as the button is pressed, the relay is ON, when the button is released the relay switches OFF. The 4 buttons can be used independently and simultaneously.

Dola Mine works well from about 20 meters in town. No more.

Dola Operating voltage: DC 12V (from 10V to 15V) Operating and idle current: 8mA when all relays are off (at 10…15V). Operating current at 10V with 1 relay ON: 43mA; 2 ON: 76mA; 3 ON: 110mA; 4 ON: 140mA Operating current at 12V with 1 relay ON: 51mA; 2 ON: 95mA; 3 ON: 135mA; 4 ON: 177mA Operating current at 15V with 1 relay ON: 63mA; 2 ON: 116mA; 3 ON: 166mA; 4 ON: 220mA So if no one relay is ON, the battery will last for very long time (more than 100 days), but if 4 relays are ON, the battery will last for 10-15 days.

Dola Yes, as you can see on a photo (see 2 DC Motor), but you have to user 2 relay for 1 motor. Use Self lock mode: Three operating modes, can be set with a jumper: 1. Self-lock (T) - jumper is on pins 1-2 (inside): When a button is pressed for the first time, the relevant relay (A B C D) turns ON, when same button is pressed again, relay switches OFF. The 4 relays can be used independently. Only one button can be operated at the same time, pressed one after the other, works nicely. 2. Jog (M) - jumper is removed: As long as the button is pressed, the relay is ON, when the button is released the relay switches OFF. The 4 buttons can be used independently and simultaneously. 3. Inter-lock (L) - jumper is on pins 2-3 (at edge): When the first button is pressed, the given relay turns ON, when another button is pressed, this relay switches OFF and the other turns ON. After the first press, one relay is always ON. When you press several buttons at the same time, the first one is ON all the time, the others are ON only until you press the button. Operating voltage: DC 12V (from 10V to 15V) Operating and idle current: 8mA when all relays are off (at 10…15V). Operating current at 10V with 1 relay ON: 43mA; 2 ON: 76mA; 3 ON: 110mA; 4 ON: 140mA Operating current at 12V with 1 relay ON: 51mA; 2 ON: 95mA; 3 ON: 135mA; 4 ON: 177mA Operating current at 15V with 1 relay ON: 63mA; 2 ON: 116mA; 3 ON: 166mA; 4 ON: 220mA Pairing the receiver and the transmitter: Power on the receiver. Press then

Dola These are WS2812B 5050 RGB LEDs, sum 61pcs, on 5 rings. Sizes of the rings I have received: 24pcs LED: outer diameter is 86mm, inner diameter is 72mm. 16pcs LED: outer diameter is 68mm, inner diameter is 54mm. 12pcs LED: outer diameter is 50mm, inner diameter is 35mm. 8pcs LED: outer diameter is 32mm, inner diameter is 18mm. 1pcs LED: outer diameter is 14mm. Works well.