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ensuring no shift in focal plane when changing filters
it can suppress stray light from entering the lens
The SV550 APO Triplet refractor with 80mm aperture and fast f/6 focal ratio
Bluetooth to make and receive calls and supports one key to pause and play songs
Retekess T128 Watch Receiver with 20 Call Buttons & USB Cable – Reliable Communication Astronomy Accessories ensuring no shift in focalProduct description T128 watch receiver Working frequency: 433 MHz Decoding: learn the code Working voltage: DC 3. 7V Battery capacity 400mAh Size: 252 x 46 x 18 mm Weight 43. 8 g Model: TD017 Modulation: AM Coding method: 1527 Voltage: 3 V Standby power consumption: <0. 2 uA Battery: CR2032 * 2 Battery: 210mAh Package 1 * T128 watch 1 * USB cable 20 * TD017 call button 20 * Stickers Safety Warning Before using this calling system, read this guide
