Today I will talk about the Speedometer, Bicycle Computer with Wireless Display 1,4 inches (Wireless Bicycle Computer with 1.4-inch Display) that did troquei DealExtreme com meus DX points. I spoke of the exchange and the package in the previous article here at Skooter Blog, so today I'll talk specifically product.
At speedometer bicycle was one of the first products I gained na DealExtreme, in May 2008. Now, almost 2 years after, he is still on the bike and running, although eventually some button pressing alone in impacts. Still decided to acquire this wireless model to leave the reservation, not least because it is priced at $8,55 USD (U.S. dollars two) which is already a good price, but not cost me anything because I used the DX Points.
The manufacturer of the speedometer is Sunding, the same brand of modelo com fio. The Chinese company has bike accessories as its main products, including speedometers and lanterns. The model is SD-548C, and appears to be the only wireless. It marks current speed, average speed, speed, Ride time, distance ride, with total distance odometer and clock. You can set the wheel diameter and thus have a high accuracy in measurements. The measures can be configured for miles or kilometers. The clock accepts the format hours 24 e hours 12 hours. The speedometer has a scan function which vai aleternando sequentially between the various measures that the computer offers. The odometer has value configurable to start the speedometer, thus there is no loss in an eventual exchange of battery.
The packaging has a sturdy plastic to leave the computer on display, while other parts come in a cardboard box (what is inside this plastic bag). In the packaging have the computer (that is removable to try to prevent theft), the part to be fixed on the handlebars (where the computer is coupled), the sensor / transmitter that is attached to the fork, Magnet (magneto) which is fastened on one of the spokes of the front wheel, clamps to attach the transmitter and support the handlebars, a bateria CR 2032 that powers the computer, a 23A battery that powers the transmitter and instruction manual in English.
Or Viewer 1,4 inches is large enough to be seen with ease during the day. The computer automatically turns off when the bike is stopped for a few minutes, and then proceeds to show only the time. The two buttons seem quite firm, probably will not be the problem of being fired unintentionally when walking on flat land less. The display always shows the current speed at the top, and the bottom may show the clock is, average speed, speed, distance, elapsed time and odometer, You can choose any of these or choose SCAN that switches between them all in sequence.
A bateria CR 2032 comes in a plastic bag, properly protected against short that could jeopardize their life, and not be pre-installed is not discharging unnecessarily. A 23A battery (TOMO Brand) comes pre-installed on the transmitter, but the most likely transmitter design is made such that the battery is only connected at the instant the beam with the magnet passes the sensor, thus consumption is zero when the bike is stopped, unlike the computer that is always waiting for a transmission. The 23A is the same battery used in remote controls electronic gates, and despite being triggered more often, the transmission power to be much lower, so I suppose that should last long. Both batteries came with their loads measured on the multimeter with values slightly above the nominal, which are 3V and 12V batteries CR 2032 and 23A respectively.
Hopefully there is some protection that prevents streaming if the bike stop the magnet exactly in front of the sensor, although the chance of this happening is small. I unlikely that there is any transmission code that allows more than one such speedometers can be used simultaneously. So these two bikes with speedometers walking together can cause interference, which should be reflected in a marking speed unstable and above normal. But that's just my guess, there may be some code or some way to avoid interference. The manual does not tell you how often used for transmission, so I can not estimate what kind of device could cause interference.